Okay.
Context. Friend (K) and I were chatting with someone we both knew (Ch). Rain was impending. Another mutual friend (K2, who is Muslim) had borrowed K's umbrella, and we joked about having to beat him to get him to return it.
Ch made some crack about how it's not murder if they're Muslim, and then defended this statement by saying that if we had been to a Muslim country we would agree.
I walked away, and flipped the bird as I left.
I plan on never talking to him again.