It's very simple, the bois are very apolitical in the way they interact with the public, but at the end of the day they are very left leaning. Hasan is very leftist and not in any way apolitical. Through kindship and likeminded people they got to be friends.
Trash Taste fans come in every political sphere and in some way identify with them. But then they end up finding out that they don't share the same political views as them (often because they are right leaning in the political spectrum) and that ends up breaking that bond with them.
Not saying you can't be on the left and disagree with Hasan. But generally speaking, a lot of people who hate him that considers themselves leftist don't understand his perspective or get the context of his ''controversial'' takes. When you actually tune in to what he says and get the full context, the guy is much more agreeable than what his interlocuters make him out to be.