"But if you keep attacking everyone, you'll look like jerks and nobody will want to respect you. Or have anything to do with you!"

He waves his hands in vague emphasis. "This whole event was to bring people together from all over space! You aren't hurting just the Zargonites, you know. You'll push everyone away if you continue like this, and they'll all think of you like Rita does."

Sure, he can just use her bullying as leverage to make his point.