So true man, so true.
I grew up with a friend of mine in Pakistan. We were like normal teenage boys talking about videogames, girls, future jobs, exams, cricket and regular stuff.
Then he moved to UK for his university. One summer after he went there for two years, I was in UK too and we met up. Dude, I can't tell you the ridiculous things he talked about all the time. He talked about how chicken is haram in the west, how he has turned down beer offers 83 times in two years, how pork is haram, how women are wrong in the west and how sinful everything is in the world with respect to Islam.
My jaw hit the floor listening to him become this normal but hard-lined Muslims in just two years. And he didn't go to any mardrasah or anything. He lived alone. Even his family was in Pakistan and he was living in the university halls with his regular, mixed university friends.
Then it hit me. The hypocrisy of a wrong teaching of religion are to blame. That hypocrisy manifests itself when exposed to the reality of the real world (more so in the West, then in a closed society like Pakistan) and then it breaks a normal person and turns him into a religious hardliner.
I can't tell you how many times I've met friends and acquaintances who are overseas Paksitanis - and in first meeting, within minute the conversation is directed by them towards haram-halal chiken, alcohol, pork and sex in Western day to day life.