Sean Strickland is literally playing a part, portraying a stereotypic character, one he has discovered, many people like to see and hear in action.
Muhummand Ali (Cassius Clay) did the same thing a ‘thousand’ years ago for boxing. Tough guys, unpredictable and at times disturbingly tough guys are allowed, even encouraged to say things the average person could not get away with saying w/o a barrelful of trouble.
I remember a few years ago, an airline was forming. It would be specializing in a special group of travelers - nudists! I guess he thought he was on that plane...🤓