I can explain in detail why I consider him to be part of the "boorish" group.
I don't have a clear definition for any word; I'm not a programmed robot that obeys precise schemes and instructions. And generally accepted definitions are nonsense, because one person considers something to be generally accepted, while another considers something else.
You reject the very possibility of the existence of any other correct opinion besides your own.
And here, see what you can talk about with such a person:
Hooligans are brainless, depressing scum whose only arguments are "hey, I'll give you a beating" and "you're wrong, damn it." 100% true.
Perhaps only about Russian rock?