Bang. Ian hit the nail on the head.
Im friends with both of them. Tension between them is tension between them. This isnt high school, where "you cant be friends with my ex if youre going to be my friend".
Telling someone, anyone, one person theyre not welcome, is essentially telling anyone who is not your bff, including new people from the outside, they are not welcome.
Jeremy, I forgot you were dictator of this clique. I also forgot you started this meet...oh..wait. Nevermind on that last part.