I disagree. I think any difference in culture these days can be directly traced back to the internet to some degree, usually a large amount.
Absolutely agree, except let us define "the establishment" instead of using it to conveniently and pejoratively name the people you disagree with.
The elite right, the "handlers" of conservatives in the US, push far more culture war bullshit on people and are much more of the instigators.
The left's culture just wants to *exist* and be left alone. The right wants to stomp out and destroy the left's culture. I mean, that's sort of baked into the word "conservative"...
Of course the left elite are not innocent in the distraction from class struggle, they just do it in the form of unkept promises or inaction.
Though obviously some generalizations here... the world is much more complex than that and can't be summed up in a few sentences like that.