On a similar note, I once went to the funeral of a guy who was a huge United fan, as were all his (large) family.
The vicar somehow got the wrong end of the stick and said "The great thing about Tom was that he was a life-long Blue. He loved City as I know all his family do too, and went to see them whenever he could. Being a Blue, he was one of the good guys, and will be going to Heaven ... rather than to the 'other place' reserved for those of a Red disposition."
He wouldn't let it go despite the shuffling of feet and looks being exchanged in the congregation ... until a member of the family put his hand up to say "Excuse me. He hated City. He was a lifelong Yoonited supporter, me Dad".
The vicar just gazed around the (unhappy) congregation for a few seconds, checked his notes for the rest of his speech again, took one last look at the congregation, wondering whether to try to undo what he had done ... decided he couldn't, went red, and then just said "Our next hymm is number ...".
Embarrassing. Funny, as a City fan. But really really embarrassing.