@Hunt:
You are dead spot on, and your analogy with communist recruiters is a good one, there were a lot of kids who went to some of the most elite schools in both the US and in places like England, who fell for the whole idea of communism as this panacea, this was especially true in the 1930’s when it looked like everything was going to hell in a handbasket, Russia as this panacea from the ills of the capitalist west, etc, was in some ways a glittering image to many who should have known better (and obviously was bs, given the real conditions in Russia at the time or any time).Lincoln Steffens, who as a progressive muckraker wrote of the reality of politics and corruption, famously said about the USSR that he had seen the future and it worked, which was weird, because his instincts should have told him that like reformist governments in the US, it was probably all smoke and mirrors, but he swallowed what he was shown; he was a bright man, but maybe he had grown bitter at the corruption and conditions in the US, and was willing to suspend disbelief (that is my take on it, anyway).
In my time in college, there were serious questions about one of the Buddhist groups that was aggressively recruiting on college campuses (NSA Buddism? It was like 30+ years ago…), and there were claims of cult like status, kids who joined it kind of isolated themselves from other students and families, hung out with themselves.
I think using the phenomenon of cults is a pretty good way to try and look at this, and it explains why otherwise smart, normal appearing kids would jump at stuff like ISIS or any other cult or whatnot. The problem is that joining ISIS or a cult has very little to do with reason, they work on the emotions, they appeal to something that is inherently irrational. So recruiters for ISIS, for example, put on a really strong dog and pony show about how in their society women would be treated with respect and dignity under Shariah law (their version of it), that there would be none of the materialism of decadent western society, that it would be about living into the will of Allah and having loving families and society, and if you find some kid feeling hollow inside, it will appeal to him/her, even though someone looking outside would say “you have to be kidding me”, they are searching for something and didn’t find it. There are a lot of kids at school, who are lonely, who might already be somewhat estranged from their families, who are on their own and now let’s say outside the strict structure of their family environment, are lost, there are various reasons why they feel the way they do. A lot of the kids who were drawn to groups like the SDS and the weather underground were from well off families, and they were drawn in by rebelling against the very system their parents embraced, the social status and materialism (and like with cults, many of these same kids became the yuppies of the 80’s, talk about reverting to type:).
As far as the parents being shocked, that might be a clue, too. Just based on my experience from my own time in college, the kids I saw drawn to certain, shall we say questionable groups, were often kids who felt ignored by their parents and families, felt like they somehow were overlooked, not appreciated, and if what the kids felt was in fact in some way true of how they were treated, then not shocking the families would not know, it could be they never really paid attention to the kid. Then again, kids also do stupid things, my S is a very responsible person about things, but over the past year or so at times has scared us, when he did things we were like “where the heck did that come from? That isn’t him”…which means even as much as we try to analyze them, think we know them, that point in kids lives are a very major crossroads, and like the emotions that drive this kind of stuff, may not be visible even to parents who think they know their kids.