Racism exists - and it exists everywhere among every race. And it's terrible whenever it happens.
Using mistakes that people make to destroy their lives does NOTHING to cure racism or heal divides. It just deepens them, hardens them, and obscures them. Morgan Scalley could have marched in every BLM march that ever happened, he could have mentored hundreds of young black men to help them in their lives - he could have gone out and killed white nationalists with his bare hands. And one single word uttered and it's meaningless and forgotten.
Two wrongs can exist at the same time. Black and white isn't that black and white.