If you equate 'sterile' with 'not verbal abuse', I suppose that's true.
Given that direct words were ignored multiple times, I would suggest that the next action is simply to not merge, without comment, after a final "You are ignoring us, we can't the time to keep correcting you. Your bad merges will be ignored without comment."
Such a path will get a developer's attention, and it involves no verbal abuse.
A problem with flinging abusive words around is that it artificially and needlessly limits the diversity of your community. Though, it might be that that's t
he intent:
"The LKML is more like a dive bar than Applebee's and that's the way they like it."