Exactly!
"Are you threatening me?! What are you gonna do? Put a hit on me? Kidnap me and exile me to a prison in Africa? What?!? Just say it in public so I have witnesses!!"
He's unable to keep an even keel, so if he's challenged like this, he'll likely flip out and say something really damaging.
Do it! Somebody needs poke that bloated balloon of an ego 'til it pops!