I believe the Nader wanting to assault Peetz thing for a plethora of reasons. Chins has used guys like Nick to try to make Nader jealous in the past and I have no doubt she's brought up that her and Peetz used to date. Peetz going off about him on stream would probably piss the crackhead off too, and unlike with Chins he really has nothing to lose if he busts Peetz in the mouth. Finally, and this may be my biggest reason for believing Gunty is correct, I cannot help but show sympathy to anyone who wants to punch Peetz. I think we've all had that moment.
I like that Peetz was emboldened to talk shit because Chantal told him it was really over for real this time. Felt so safe that he was able to add him to the "He's a fucking asshole!" list next to Jeff Bezos and Chuck Norris with reckless abandon. That poor annoying punchable simpleton.