Let us see what is Qahtani Arabs? You will understand what is Ismaeli Arabs in the end. This is just a free information from my own sincerity. You do not need to open various books, clicking threads or doing assignments because I will try to make this easier for everyone especially Western friends to comprehend.
Qahtani Arabs
The Children of Qahtan are the descendants of Yaarob Ben Qathan. This tribe were originated from Mesopotamia. Because the population in Mesopotamia keep increasing and the spaces becoming small, they have to moved out. They moved down South in Yemen in gradual from Mesopotamia.
Before the Qahtani Arabs arrived, Yemen were inhabited by the "Second Aad." Thus the war waged between these two tribes. The "Second Aad" were lost in the war have to live under the rule of Qahtanis. Later they were assimilated into Qahtani.
Qahtani Arabs had established several kingdoms.
1. Yemeni kingdoms
Because Yemen is a fertile region, the Children of Qahtan did not live nomadic life. They began establishing permanent settlement that soon became kingdoms with cities.
a. Sabaiah (Sheba)
The first king of this kingdom is Sabaa (Sheba). This king had developed a city as an administration center which is called as Ma'areb. Near this city, a dam. This dam keeps the water from the rain that poured down in three months every summer.
The dam has doors that can be opened and closed according to their necessity to water, and the water was irrigated to canals.
With good irrigation system, Yemen became a fertile region with greens. The dam is known as Saddu Ma'areb.
After Sheba died, he was then succeeded by his descendants. Among them is Belqis (Queen Sheba). She lived in the reign of king Solomon (pbuh). The story in Quran is in Surah an-Naml vs. 20 - 44).
This kingdom survived for such a long time. When they forget G-d due to the luxury of life, and turned to other god which is the Sun (a creature), G-d then had destroyed their kingdom with a big flood. This flood happened when the dam Maareb was broken.
The dam Maareb was broken because the people had forgotten to inspect the dam due to the exceeding enjoyment of life and it's later broken and the water brings a big flood that ruins their kingdom.
However those who survived moved again to several places around Arabian Peninsula. According to Sedelliot, this dam happened to be broken in 120 BC. We read this story in Quran, Surah Saba vs. 15 - 17.
b. Himyarite kingdom
This kingdom was established not long after Sheba kingdom was destroyed by the flood. The people who established this kingdom are those who survived the flood in Sheba kingdom. Himyarites are a sub-tribe of Qahtani Arabs of Saba kingdom. Himyarite kingdom's center is in Sanaa.
The kingdom last long. The last king is called Yousuf Zun Nuas. During the reign of this king Himyarite kingdom is in its downfall. Yousuf Zun Nuas embraced Judaism. He also had forced his subjects to embrace Judaism. There are the subjects in Najran who believes in Jesus (pbuh). The teaching of Jesus (pbuh) was brought there by a person whose name is Faimiyyoun (St. Phemion of Syria). The people of Najran refused to embrace Judaism and they were tormented and burned by the cruel king. I think it is around 534 C, and more than 12, 000 being burned. Some Muslims who interprete Quran had stated that Yousuf Zun Nuas is the one among those who were referred as Ashaabul Ukhdud (the makers of the pit of fire) in the Surah al-Buruj.
Surah al-Buruj translation by Abdullah Yusuf Ali
4. Woe to the makers of the pit (of fire)
5. Fire supplied (abundantly) with fuel
6. Behold! They sat over against the (fire)
7. And they witnessed (all) that they were doing against the believers
8. And they ill-treated them for no other reason that they believed in G-d Exalted in Power, Worthy of all Praise!-
9. Him who belongs the dominion of the heavens and the earth! And G-d is Witness to all things.
10. Those who persecute (or draw int temptation) the believers, men and women, and do not turn into repentance, will have the penalty of Hell: they will have the penalty of of the burning Fire.
Due to this brutality, the Emperor of Eastern Rome, Ceasar Justin I (518 - 527 C) who is the protector of the religion of Christ had ordered the Najasyi (Negus) of Ethiopia to attack Yemen.
Negus then sent an army under a war chief whose name is Aryath. King Zun Nuas had no force anymore to avoid the attack and he ran. After that, this kingdom had fallen under the administration of Ethiopia. Aryath became the first governor. Aryath was later murdered by Abrahah who is also an Ethiopian war chief. Abrahah appointed himself as the governor and approved by Negus in Ethiopia.
Abrahah too had forced his army to attack Mecca in order to destruct Kaaba structure. He had also had made another building in Sanaa so that people will perform pilgrimage there and not anymore in Mecca. When he nearly reached Mecca, G-d had sent a kind of disease to them through the birds. Many of his army died, and he himself died when he reached Sanaa in Yemen. We read this in Quran, surah al-Fiil vs. 1 -5.
This event happened around 570 C. In 20 April 571 C, our holy prophet Muhammad (pbuh) was born in Mecca the holy city. After Abrahah died, he was succeeded by his son. But later, a Himyarite whose name is Saif Ben Zi Yasin had lead a rebel. He asked the help from Persian king whose name is Anoushirvan (531 - 579 C). They succeeded expeling Ethiopian from Yemen with the help of Persian army under war chief Wuhrouz the Dailami. Saif Ben Zi Yasin was appointed a king by Persian king.
Many noblemen from around Arabian Peninsula greet Saif Ben Zi Yasin. Among those noblemen is the grandfather of our prophet whose name is Abdul Mutallib Ben Hashim, he is also the servant of the Kaaba (the one who keep the key of Kaaba structure). It is narrated that when Abdul Mutallib met Saif Ben Zi Yasin, he had foretold Abdul Mutallib about a prophet will be sent by G-d from among the Arabs.
However Saif did not rule for long. He was later murdered by some Ethiopians that still living in Yemen because he had oppressed them. Yemen then fallen again under Ethiopia. The king Anushirvan then had sent his army again under Wuhrouz the Dailami to liberate Yemen. Because Yemen still can't stand on her own foot yet, Persia had put it under Persian protectorate land. Wuhrouz became the governor and he ruled Yemen under the name of Persia.
After Wuhrouz died, he was succeeded by other Persians. The last Persian governor is Bazan. In the time of Bazan, Islam shines. Bazan then embraced Islam and under his rule Islam spread in Yemen. Later Yemen became a Muslim territory.
2. Manazirah kingdom
This kingdom is located in Mesopotamia. It was established by Qahtani Arabs of Yemen who had returned back to their ancestor's land after the flood of Maareb. This kingdom is also known as the Lachmides (the children of Lakhim) or Hirah.
Manazirah kingdom is not an independent kingdom. They are under the influence of Persia. Persia had appointed the rulers from the children of Lakhim and they ruled the Arabs in Mesopotamia. They were used as puppets to:
i. be a buffer state for the business of Persian in Arabian Peninsula and also to guard the Persian whenever they do business in Arabian Peninsula from the attacks of Arab tribes that live in Mesopotamia.
ii. protect Persia from being attacked by the Arabs
iii. be a tool to oppose Eastern Rome. Eastern Rome and Persia are always in battle. In the side of Persia, the Manazirah kingdom provide assistance in the form of army.
Manazirah kingdom last for about 600 years. The last king is al-Munzir Ben Nu'man. He died in a battle when fighting Muslim army under the chieftain Khalid Ben al-Walid in the reign of our caliph Abu Bakr as-Siddiq (G-d be please with him). Later in 633 C, Manazirah was included under Islamic territory.
3. Ghassanides kingdom
This kingdom located in the South of Syria. It was established by the Qahtani Arabs of Yemen. They also moved there after the dam Maareb was broken.
This kingdom is also a protectorate of Eastern Rome kingdom. This kingdom is used by the Eastern Romans to guarantee their business work smoothly and also to guard Syria from the attacks from other Arab kingdoms. It is also used to oppose the Persian influence.
This kingdom later fallen and it was included under Islamic territory during the rule of our caliph Umar al-Khattab (G-d be please with him) who ruled in 13 - 14 H (634 - 644 C). The last king of Ghassan is Jabalah Ben Aiham. He had embraced Islam but during Pilgrimage ritual in Mecca, a commoner had unintentionally stepped on the edge of his white robe that made he slap the person's face. This case was brought to the our caliph, and he asked the king to apologize because there is no more status difference when performing pilgrim. The king is an ego and he refused. Later, he ran to Constatinople and seek the refuge under Heraclius I. He died as a Christian in the year 20 H in Constantinople.
4. Kindah kingdom
This small kingdom is located in Nejd. It was established by the Qahtani Arabs from Yemen. They moved there after the flood from the dam Maareb. The last king is Umrul-Qais. He is also a famous poet and he died 50 years before prophet Muhammad (pbuh) born.