Well, you did basically tell your friend who just literally pretended to be Tzar Nicholas that you’d be willing to shoot them, right to their face. Haha
I would have just said something like, “I wouldn’t be friends with you in the first place if that was the kind of person you were, so the question is irrelevant.”
You could’ve been kinder to your friend, who is now either offended or scared of you (but that’s kinda funny, to be honest).
But are you the asshole for insisting to kill the Romanovs? NTA!