He has a history of acting that way.
Please. I am being serious. He has a history of acting WHAT way?
Has he advocated killing ALL cops? Does he have a history of encouraging people to go out and kill cops for the heck of it? If so, then he was wrong.
However, the way I read the statement he made THIS time, the man was talking about defending himself from an attack by a cop - and in that context I agree with and support him.