The problem is that they have little going for them often because of the lack of opportunities present thanks to the mess made over the last 100+ years. I grew just at the edge of a First Nations community here in Canada. Many of the kids I went to public school with were First Nations kids, and regardless of the fact those communities are allowed semi-autonomy, very little in the way of taxation, free Health care, free university, and great work place incentives now, that's not enough for these communities to overcome the disenfranchisement and crushing circumstance of both recent past. I don't know you well enough to know your circumstance, and what you overcame, but these kids coming out of war torn, oppressed regions, that grow up in a climate of watching their parents and community helpless against the onslaught, well that's traumatizing. In some cases it leads to alcoholism, drug abuse, crime... In other cases it leads to things like murder and terrorism in specific parts of the world.
Just because there are cases of people overcoming such circumstance and environment in upbringing doesn't mean every child is strong enough to overcome that growing up. And you know that. I've seen the devastating effects firsthand of disenfranchisement, loss of land, abuse in residential schools, and subsequent drug and alcohol abuse. It's fucking tragic, and worse is that the legacy lingers through several generations. So it's bullshit to say that it has nothing to do with the circumstance and environment these kids are raised in where they feel completely helpless in the face of such shit, and now when they watch their parents unable to cope with their own childhood tragedies and abuses.
It's not everything, but it pretty obviously is part of it, hence the anger and hatred towards western nations that is, in part, justified.