Well, the point that hate crimes can be (and are) committed also by blacks against whites is certainly valid, although the waitress case doesn't seem to be one of them. The fact that it happens in one direction doesn't justify it happening in the other.
I knew a white man who lived in a racially mixed neighborhood. I say racially mixed because over the years it balanced out more, but at that time (early 1990's) it was probably about 90% black or more, 10% white or less, and that's not factoring in other races. That man had a second shift job and was walking home from it around midnight or so. By the time he arrived home, he was beaten and bloody and had to go to the ER. To hear him tell it initially, he was jumped unprovoked by a gang of black teens, and it had to be racially motivated. They didn't like him living in "their" neighborhood because he was white, was his guess.
Later more details came out. As he was walking home, he had noticed this group of black teens walking in the same general direction, but not really focusing on him. Because they were simply THERE, however, he kept nervously looking over his shoulder at them. Finally, although they had not laid a hand on him or spoken a word to him, he got so scared he threw his drink at them (a large soda with ice in a paper to-go cup) and took off running. They chased him down, and the result was stitches in his forehead.
Yet initially he had said it was "entirely unprovoked." It wasn't, if he threw something at them. He thought he was the victim of a racially motivated hate crime, but the way I see it, HE was the one stereotyping THEM. Because they are young and black, they must be a gang, not merely a group of friends, right? I lived in that same neighborhood, and I was always safe any time of the day or night. If it had been me, seeing those kids, I would have smiled, waved at them, and said hello as I passed, and I'm confident I would have made it home safely.
Note, the fact that he did provoke them did not, in my opinion, justify their response. I'm only saying he wasn't entirely innocent, as he first claimed.