I may have this wrong, but it seems like you want to reserve the right to do nasty name calling because it only happens every couple of months? And you're looking for validation as to whether that is reasonable or not?

Name calling hangs in the air of your marriage for all time. Each name calling makes that air thicker, heavier, and harder to breathe.
Sooner or later, she'll begin to crave fresh, untainted air that feels good to breathe.
And you want her to commit to never getting divorced, while you feel free to name call cause it only happens every couple of months.

Yeah, good luck with that.