Yeah it's pretty similar in gangs in Japan Korea Asia, even mafia in various places. Essentially if you don't have any prospect of achievement then you have to assert yourself somehow, if that is in your personality as it is with many people.

After a while the subculture starts mimicking that behavior even when the economic prospects and opportunity is present.

It's a lot easier to just self-assert yourself in the moment than spend years building up life achievements to gain a strong self-image that way.