he said "sup nigger" to his white friend who responded to him in a friendly manor(in a private conversation no less)
so... he didn't discriminate against a black person... so how was this racist?
He openly used racist language on a platform that prohibits racist language. He openly used racist language in his work environment, which prohibits racist language. He openly used racist language knowing that people watching his content could be extremely offended by his words and actions.
He was dumb enough to leak it.
He's apologized for using racist language and admitted he was in the wrong.
What exactly is your argument here?