Yes I have seen this- A Muslim is not to question anything in the Quran, some even guard hadith in such a way. It is not allowed that someone outside of Islam understand something different then what the Muslim, imam, tasfir says. I believe this is part of our misunderstanding.
Of course, we Muslims do not have to question the Quran. It is the Word of G-d cast to us through the tongue of the prophet, and we had already having our faith to previous revelation through Quran. We may think about Theology but it should not crossing the line of Quran and Sunnah (prophet tradition). If not, we are creating our own religion.
As you understand, we have the science of interpreting the Quranic verses. We have methods regarding the style of the language used in Quran and we can't simply take it as we desired, because we need to analyze it according to what He wants us to understand. We learned about why certain verses being revealed to the prophet, emaning of the words, and the moral of the verses.
This is different from the translation of KJV Bible in 16th C English. We still use the Quran that is in the language of our prophet as it is being revealed in it. Arabic is an ancient language just as ancient as other ancient languages, but since Arabs are not living in established environment, their language is not properly documented like after our prophet time.
As for Christians today, language is not important as the Bible is translated earlier into Greek and later to Latin. But for us, G-d had revealed the prophet in Arabic, and He had emphasized it Himself in the Revelation to the prophet. There are several verses about the revelation is in Arabic, that Muslims should take heed about it, one of them is as follows:
Thus have
We sent this down - an arabic Qur'an -
and explained therein in detail some of the warnings, in order that they may fear Allah, or that it may cause their remembrance (of Him).
(the meaning of Surah Tha-Ha 20:113)
Christians are to test are to test and question every scripture. Christians do and have tested the text of the Holy Bible through much criticism and textual alnalyzes. We have allowed the Holy Bible to be ripped apart- because we know it can withstand the test, it is from GOD.
Actually this had already happened since the time of our prophet lifetime. Not only Christians testing him, but also the Jews.
Like in these verses,
Say (O, Muhammad!): He is Allah, the One and Only 1 Allah, the Eternal, Absolute 2 He begetteth not, nor is He begotten 3 And there is none like unto Him 4
(the meaning of Surah al-Ikhlas 112:1-4)
The reason why the verses was revealed:
In a narration from Abu Syaikh from Aban with the source from Anas Ben Malek, it is reported that a group of Jews from Khaibar had met the messenger of G-d and said: "O father of Qasim! G-d had created the angels from the light of His Veil, Adam from the clay, Devil from the Fire rising up high, sky from the smoke/wasp, and earth from the bubbles of water. Now, explain to us about your G-d." Thus, these verses were revealed to the prophet as to answer their questions.
This is how Jews had also tested other previous prophets. The prophet Jesus (pbuh) too was tested with questions by the Jews. Some of the Jews had entered Arabian Peninsula and lived there after they heard the prophecy about the final prophet. They waited there from generations to generations and hoping that the prophet will be from among the children of Israel who live in Arabian Peninsula. However, they were disappointed due to that G-d did not fulfill their desire. They thought that they are Greatest than G-d to ask G-d to fulfill everything as they like as He is some kind of Genie of the Lamp. The final prophet had been pre-destined to be raised from the Children of Ishmael among the descendants of Kedar.
According to other narrations based from the source of Abdullah Ben Abbas Ben Hatim, among those Jews who asked the prophet about G-d in Islam is Ka'ab Ben Asyraf Ben Hayy Ben Akhtob. This is stated by Ibnu Jabir from the source that he got from Qatadah and Ibnu Mundzir from the earlier source of Said Ben Jubir.
Also in another narration, it is reported that this Surah al-Ikhlas was revealed due to the questions of the pagans about the nature of G-d. The main content of this Sura is to answer the questions of the people in denial (Jews or the Pagan Arabs of Mecca) about the nature of G-d.
This is also the source of our Creed as Muslims, believing in Allah the Holy G-d. Worships (enslavement) of ourselves only to Him.
Say (O, Muhammad!): He is Allah, the One and Only
The word (Say!) is in imperative mood. This is an order from Him, to Muhammad and the Muslims to answer to the others when they are questioned about the nature of G-d. To say that He is only One (Ahad/Ekhud), not divided into several persons or personality. He tells us that He has no associations with anyone, solely Him.
Allah, the Eternal, Absolute
Allah needs not his creatures. He is independent. Creatures are those who need Him. From where is our force? From where is our souls (including the soul of Moses, Jesus and Muhammad)? From where we've got our food? Every force, life, and blessing are coming from Him. we have this phrase that we recite whenever we face hardships and trials, "Indeed, that we belong to G-d, and to Him we will return."
Allah needs not His creatures to live. He is already there, because His life is not from others. He is since before the beginning, and will continue in existence forever. We are those who will not last long whether we deny it or not.
He begetteth not, nor is He begotten
Adam, the first human created without a father and a mother and was not born like ordinary human-being. But he experienced normal death. Human continue to exist in the earth through reproduction system. Human being born since Adam an Eve till today.
Allah is Independent (QiyamuHu Ta’ala bi nafsiHi). He is already exist without anyone creating Him and He is not begotten He never dies, and will never dies. Allah is Eternal. He doesn't have to have children or descendants to keep existence continue like human. Thus, anything that experienced death or destruction, are disqualified from being assumed r worshiped as G-d.
And there is none like unto Him.
There is no one who is equal to him. No one is the same like him. He is Unique. He has no parents that giving birth to Him and no one had created Him. He never goes to the market, nor need food to continue living. He never exhausted or sleeping. Allah always Live, never dies. The verse ordered us to: "Say to Me! Is there any substance like this other than Allah? Bear witness that you had chosen Allah as G-d. Bear witness that n One should be worshiped except Allah!
This is and example on how the Quranic verses being interpreted by Muslims. We checked everything including the words used, the structure of the verse, the mode, the tone, the reasons behind the revelation, conjunction to historical events, and etc. Every Muslim who wants to interprete the Quran must first being well versed with the Science of Quran which has various sub-branches and understanding the importance of Quraisy Arabic.
This is in Malay, for documentation
http://manhaj-salaf.net46.net/surat-al-ikhlash-memurnikan-tauhid/
.