Strange rant🤷🏼‍♀️

My fiancé invited his friends to MY FATHERS cookout tmrw without mentioning anything to me or even asking my father if it was ok. Back story: he just got a new home and this is the first get together. Only my family is going. He did not extend out and say invite anyone. Me and SO have been at it arguing all week and I think this takes the cake. He says my family is so rude and strange??? Uhm he’s the one in the wrong here inviting ppl to someone else’s house? His family always invites anyone and everyone but my side of the family is more private. It’s a constant conflict he doesn’t seem to understand. I think it’s just plain rude of him to even think to invite his friends. Ugh end rant.