Idk. I graduated in the past decade. My school had a pretty expansive program of advanced classes and not advanced classes, which resulted in basically isolating the smart kids from the not so smart kids. Because of this, it was fine to be nerdy and smart. Yet in senior year there was an unexpected sort of social war when the not so smart kids wanted to control things like prom, and were unhappy when the rest of the school, who were never seen in their social circles, also had a voice. Got quite nasty. My area was relatively wealthy, and people probably had generally good lives. I think it would have been very unpleasant if it were a poor area with no separation of classes and more frequent trouble at home situations.
At the end of the day, if kids are struggling, they're going to feel frustrated. And they're going to take it out on the physically weakest kids and the ones who are most making them look bad by being good at school if they're not separated, protected, or somehow made mutually engaged (all of which are expensive things to implement). I don't think it has anything to do with anti intellectualism personally.