There is never any reason for violence in a discussion.
he didnt ask about a "discussion"
but sometimes a discussion can lead to more
like if someone is mistreating an elderly person or a child
one time years ago i saw some punks pissing on an old homeless guy on the side of a 7/11
i said "hey whatz up...why ya'll jacking with this old helpless feller?"
they laughed and said "mind your own f-ing business"
i said "being human is my f-ing business"
so i dialed 911....the loud mouth punk approached me and said "now i'm gonna piss on you"
so i punched him in the jaw as hard as I could and said "the hell you are". even hurt my hand!
they scattered like rats.....the cops arrived 20 mins later
sometimes a mans gotta do what he's gotta do