Rogan was labelled alt-right after he interviewed Gavin McInness and Alex Jones again (a comical interview btw). That may have been cancelled out by him interviewing Bernie Sanders though.
If he were more 'soy' and less 'bro', while having the same mostly-liberal opinions, he'd get an entirely different reaction from the elite cultural left.
Think culturally lowbrow vs cultural elite. Rogan came up as a cage fighting commentator. In Europe there would be a lot more techno blasted out of a much smaller car.