I don't think anyone made that point though. Khabib should definitely be punished, most people agree to that. Everyone just pointed out that Dana is a dumbass for enabling an environment that fosters this kind of incident and that Connor and his goonsquad got what they asked for. When you vandalize (to put it lightly) a bus with people in it and go as low as calling someone else a terrorist while also belittling his culture/religion, eventually someone is going to flip out.
That's not even mentioning the wife stuff though. As a fellow married man (at least I think so, aren't you?) I'm sure you can understand Khabib's reaction to some degree. 99.9% of people have their triggers (some obviously have more than others) and I imagine hearing something about having his wife raped (specially when she didn't even take part in the conversation, the woman is somewhere in Russia taking care of their son) is a fairly common one.
It's like when Richard Spencer got clocked by that dude. Fuck Richard Spencer, but I'm not going to defend a guy that sucker punches someone in the street (insert "that was the wrong thing to do, he shouldn't have done that" here). Arrest him and charge him with assault for all I care. Still, fuck Richard Spencer.