domaster, it sounds as though you are saying that we can only trust Islam to be truthful about Islam.

Very well, let's try these!
"We are ex-Muslims. Some of us were born and raised in Islam and some of us had converted to Islam at some moment in our lives. We were taught never to question the truth of Islam and to believe in Allah and his messenger with blind faith. We were told that Allah would forgive all sins but the sin of disbelief (Quran 4:48 and 4:116). But we committed the ultimate sin of thinking and questioned the belief that was imposed on us and we came to realize that far from being a religion of truth, Islam is a hoax, it is hallucination of a sick mind and nothing but lies and deceits."

Or we could look here:
"Dear Apostates, If you have left Islam and do not want your information listed here, please understand that its very important for apostates to form a group. Nothing agitates a Muslim, as much as seeing a group of people who have left Islam. This is why Mohammed ordered to kill us! He knew we know the truth about Islam, and we would be the ones who could make the lies he was selling to people fall down to the floor like an imaginary sand castle." [Emphasis mine.]

And these are former Muslims, remember. They have intimate knowledge of Islam.

I would point out that Islam is not alone in proscribing its followers from thinking for themselves. Many religions do the same. It seems to be one of the prime tenets of religion: belief trumps rational thought. This is the antithesis of science, which values rational thought above everything.

That does not mean one cannot have faith and be a scientist. Far from it. There have been, and are, many scientists who believe in one god or another. Faith is a personal journey. Religion, especially dogmatic religion, tries to force that journey along specific roads, mapping out the destination and way-points along the road, and anything which contradicts or negates that dogma is pushed to the edges of the map and marked, "Here there be Dragons!"