Sure I agree with all of that and I certainly don't underestimate just how many stupid people there are out there.
That said, if the guy did indeed slap him it should have been settled between him and the man he slapped, and the half dozen other lowlifes who sucker punched and stomped him on the ground are inexcusable, as is the guy who punched out the woman.
Just pure animal behaviour, zero honour and pure cowardice, and I wish I could say that it's not common in that community and if it wasn't I would just see it as a bunch of degenerates and probably wouldn't even bother making a thread about it. But unfortunately it's way too common to ignore, it's a real issue with that shitty culture that needs to be addressed, this is behaviour one can expect from extreme outliers and sociopaths, maybe one exceptionally cruel person in a crowd of 50.