My position on the matter is: there is no proof of racial bias so we cannot say that her actions were racially motivated. There is no proof that racial bias motivated her actions(at least no one asserting "SHE JUST RACIST!!" has presented any proof of this being racially motivated). I would have no problem considering it if someone could supply me with examples of her being racist in the past(e.g., racist tweets, footage of her assaulting other black men, footage of her being racist, or racist forum post). All I got from @Mowgli was "it's true because I said so" and @7Revo tried to back up his assertion with anecdotes(which we know are worthless in most arguments) that weren't even connected to her or anyone else at the event, the only connection his anecdotes had to this situation was video games. You can assume many things such as: maybe she didn't like him as a person, and maybe she was on a time restraint and wanted to get a game in before she had to leave so she tried to sit him down.
Bruh, I'm not trying to say you are completely wrong but your stance seems to not factor in social norms and behavior of this gamer culture and it comes across as very ignorant to the reality of the majority of these cases (and also why you are consistently being accused of being white)
First of all, your position is based and presented on subjectivity, which is already coming in on shaky ground. What you consider proof may not be sufficient for the next man and vice versa. It IS possible that the white girl might not be racist but based on her actions, her expressed track record from people that have interacted with her and the way the situation was addressed, it seems very likely race had a lot to do with her feelings and actions. What the black dude did was not uncommon for any sort of video game tournament, especially in fighting game ones, he acting like that in that area expressed more of her distaste with the individual than with the actions.
Second, she acted as if she could physically accost someone and suffer no repercussions. Only entitled and spoiled people do that, sane people do not. Her attempting to make those aggressive actions towards a man, a black man at that, implied her lack of respect to the black man and/or a gross sense of superiority over him due to her being white and/or a woman. This mentality is common in the gaming community as well as commented on the bannings of posters on neogaf for having a difference of opinion to the common "******" spams on every online system.
Third, you are acting like this is something new. Majority of the people on this site are black and dealing with racism is very common to us, we know what it looks like, what it feels like and the difference between racial anger and regular anger. When you have the overwhelming majority of black people calling it racial, chances are there is some racial element there. Why do you feel that the majority of the posters here are "making this up"?