Well, if you prove that you aren't some heretical chaos god worshipers, heretical xeno lovers, or someone that doesn't try to piss him off then they should be fine... Or at least less wary. I will try to keep him under control and not attack anyone that doesn't try to provoke him to fight, and mainly just make him sit in the corner seething in rage that there isn't anything to fight. He isn't really blinded by rage that covers all of his judgement like the Khorne worshipers, he is just really pissed off all the time and will gladly release that anger on something that is heretical. So, he does strive for violence most of the time, but only on the people that deserve to be punched in the face.