She doesn't bother with cooling off time. And its mostly, well, I know this comes from Damon, but back home this was not how she reacted to Elena. She apparently went off on the hunt for the cure with her. Not fond of her by any means but not this pure rage.
Stefan won't leave her, even I can see that.
Henrik doesn't need to see the level of arguing this brings about. I won't leave him out of making decisions on these plans but he's hated the arguing so much already