Here it is from the Islamic web
The only religion approved by God is Islam (Submission)" 3:19
Quran-Islam.org - True Islam
This is where the whole rot and intolerance emanates from.
If from childhood you are repeatedly indoctrinated that
The only religion approved by God is Islam, then you start believe this, and depending on your 'brainwashing', think all others as
untermenschens. It breeds intolerance. And for the more radically brainwashed, it becomes a 'holy' mission to 'cleanse' the world of the 'unfortunate' and even 'disgusting' morass and scum that have not been 'cleansed' of their pagan ways.
I might remind that irrespective how educated or how affluent you maybe, it is incumbent to hire a Mullah man to teach the Koran to the children, in addition to their other worldly education. Therefore, to believe that only poverty makes terrorists in the name of soldiers of Allah is patently false. It all depends how radical a Mullah who has taught you the Koran. That is why one finds educated and even affluent people renouncing it all to become soldiers of Allah or Mujahideens.
Further, such education from Mullahs make the Muslims refuse to believe any other point of view but their own.
That is why they live in denial and think the whole world is wrong and they are solely right!
Fortunately, those who are citizens of secular countries, have a lesser number of such religiously indoctrinate fanatics in their fold.
However, in more liberal secular countries, they get more radicalised since they feel that they are deprived of the real Islamic environment to pursue Islam and so they have to show that they are real
Momeens even if not in an Islamic nation.
Guilt complex overpowers these Muslim chaps of liberal non Islamic nations' citizens.