Shaykh ul Islaam Ibn Taymiyyah, rahimahullah said in Majmoo' il-Fataawah Vol 27 Pg144
"
The ruling concerning The status of domains changes in accordance with The changes in The conditions of it's inhabitants. A domain may be
The domain
of disbelief [dar ul-kufr] when it's inhabitants are
The people
of disbelief. It then becomes
The domain
of Islam[dar ul-Islaam] when it's people become Muslims, just as Makkah may Allah ennoble it, was at first
The domain
of disbelief and war[dar ul-harb], and Allah
The Most High said concerning it, "And how many cities stronger than yours, which has expelled you.." Surah Muhammed:13. Then after
The conquest
of Makkah
by The Prophet sallallahu alayhi was salama, it became
The domain
of Islaam. And it is, in and
of itself, "the Mother
of all Cities" and
The most beloved place on
The Earth to Allah, just like
The Sactified[Holy] Land wherein
The giant people resided as Allah
TheMost High has mentioned about them, "And when Moosa said to his people, "Oh my people, remember Allah's favours upon you when he places among you Prophets and made your Kings, and He gave to you that which He had not given to any other nations. Oh my people, enter into
The land
The Sanctified Land that Allah has decreed for you and do not turn away on your backs, then you will be
The losers!", they replied, "Oh Moosa, they are a giant people therein, and we will not enter until they have left. When they leave, we will enter." Surah al-Maa'idah:20-22.
And
The verses when Allah
The Most High saved Moosa and his people from drowning in
The sea He
The Most High said, "I will cause you to see
The domain
of Therebellious[dar ul-faasiqeen]." Surah al-A'raaf:145. These were [named as]
The domains
of The rebellious at
The time when
The rebellious inhabitated them. Then, when
The righteous people inhabited them they became
The domains
of The righteous[dar us-saaliheen].
This is a fundamental principle which it is obligatory to have knowledge of: just as
The condition
of it's inhabitants change, so does
The ruling concerning it. Verily praise and blame, reward and punishment are consequences
of al-Eemaan[faith] and righteous actions, or consequences
of disbelief, rebellion and disobedience."