I agree that this misconception there is that families and value systems are destroyed when children are raised in the West must be removed because it just isn't true. More than anything kids can get a varied perspective by interacting with people from different religions, countries, ethnicities and have a wider world view.
You know what? I'm going to venture on to say I slightly disagree no matter how blasphemous I may sound. If you think about it, why is that we think family values, respect, cultural patriotism and religion go haywire the moment you pack your lodgings and fly to the West? Clearly environment plays a role in harmony with the developmental age. If an expact's kid is born and raised in the West, unless the expact in focus is deeply devoted to his cultural beliefs miraculously, this kid is always slightly more on the brink of destruction than, say, a kid born and raised in Pakistan. And the environment, the sort of exposure a kid receives day in and day out, the ambiance, the people, the classmates all are prime factors for the way his thinking is going to be shaped and tuned for the rest of his life. Western life thrives on things like clubs, parties, drugs, relationships and even though such acts of blasphemy do exist in Pakistan, for example, they are still not as common or as ordinary when you compare or perhaps just done in enough a limelight for a normal 8 year old to notice. And if anyone does argue with what is said above, then I believe that even with the existence of such worldly distractions, there's always your family -ranging from mum, dad to third, fourth and what not lineage of cousins - who are there to perhaps try and remind you of reality i.e something to hold you back. To top it, in the West there is the whole idea of mum and dad both working their butts off to get themselves out of the debt load which leaves the kids craving for attention and totally ignored which then ultimately leads them to follow what every white kid does i.e succumb to peer pressure and just go along with the flow. The same scenario, i.e both the parents working, could be applied in Pakistan too yet, like I said before, there's always someone be it your third cousin's mum or summat who is there. Just look at the stats- compare how many kids in a class goes clubbing in USA vs Pakistan. You'll see the difference.
At the end of the day though, so is what happens for the majority. Like anything, there's always exceptions and ultimately really depends on the person in question himself. Does he/she want to change? Have the kid received enough tuning in his/her developmental age to be able to discriminate what is wrong and what is right? All this drastically depends on parental nurturing ofcourse and not directly west or east but the argument is that parental attention is, most of the time, closer to the zero end of the scale in the West in addition to the West boasting more resources, peer pressure and the likes.
Man this has gotten long. Sorry just my two cents. Way offtopic I know...