Tensions are running high right now, and you're going to have to put extra effort into not flying off the handle when someone says something that sounds rude to you. Give people the benefit of the doubt, especially the newer people in your world. They might not know the rules, and it's really not up to you to teach them to them. This person will learn the lessons they need to learn eventually, and it's best for you to walk away from any dramas that they create. You don't need it.