People of all backgrounds behave badly. Did you miss the videos of white leftists rioting in the streets? They were rioting and attacking people long before 2020, too.
This 15yo didn’t shoot up a school, nor did he do a drive-by shooting, nor did he riot in the street. He lost control of his temper, destroyed the apartment, and attacked his mother. She says he is mentally ill. If he really did what he’s alleged to have done, then he has shown the signs of mental illness.