It's a bit like knock-door-run for older kids.
With the addition of feeling part of a globally coordinated movement with a 'subversive' ideology.
would it help if we all clubbed together and bought them each a guitar and a copy of the RATM tab book? That might help them get their apparent anger out.
This is the mistake people make. The ones who act like this aren't angry, offended, scared or defensive. They regard such feelings as immaturity and gain their sense of superiority for rising above such feelings and mocking those who fall short (or who they trip over).
It's why the insults towards them, or claims they are somehow inadequate never bite. It's like throwing primary school playground insults at sixth formers.