If this is someone you’ll be seeing a lot, it’s best to try to make peace with them. Instead of “pouring fuel on the fire” it’s best to “pour water on it”.

Personally I’ve had conflicts in my life with others, but instead of reacting negatively, I made an effort to do the opposite. In one case that resulted in a friend instead of an enemy. In other cases it has diffused the situation.

It helps to try to put yourself in their shoes. Try to understand where they are coming from and what has driven them to react like this towards you.