Actually, "whites" do engage in this sort of behavior, quite often in fact.
Ask your local constabulary how many such incidents they respond to where it's white folks being beaten, doing the beating, and standing aside watching the beating. The fact that they don't do it at MacDonald's or other public places very often is the only real difference.
Asians, I don't know about although there's more of it in some predominantly Asian neighborhoods than you apparently think.
It may not be statistically as common, but it's rampent. By the standards of only thirty years ago it's absolutely amazing how many women are beaten these days. Regularly beaten at that. Teaching several generations that there is no reason to respect gender differences and that all mortality is relative is bearing this sort of fruit across the board.
Not buying it. Crime stats alone should tell you that's BS. The press goes out of its way to bury these kinds of stories when blacks are involved, but we still see innumerable episodes.
You know the press goes out of its way to publicize white crime. So where are the videos of whites doing this?