Monkeygrinder's Organ
Dodgy geezer swilling vapid lager
I think that to suggest that it's simply about different posting styles, as you and various others have done, is actually to miss the point.
Urban is a left wing forum, but it's one where many posters reject many of the approaches of the mainstream liberal left wing.
In particular, we reject the idea that mocking our political opponents or dismissing them as stupid (or racist or whatever) is in any way helpful or constructive. That sort of posting is, and always has been challenged here, not as a matter of style, but as a matter of political substance.
It may appear to some newcomers that they are being challenged simply for a matter of style, or even simply because they're new, but that that's because they haven't understood the political substance of the disagreement.
It's probably quite revealing of the state of the left (or however you want to describe it) that people who consider themselves left wing and politically informed often just don't know about anything left of that sort of Labour/Democrat neoliberal left.