Is AUTHOR wrong in the post ? POST : Let me give you context and then the incident.

My friend and I were bridesmaids in another friend's wedding. Besides their family, it was the first time I met my friends' other friends. The wedding took about a year to plan with lots of various parties along the way. We all got along fine until the actual wedding, where a groomsman was a total asshole to me (although, not to my friend... yet). He mocked my laugh when we were all chatting and drinking at the reception. He mocked me again when I cried as the bride and groom left.

So, I pretty much hated the guy after that.

That brings me to now. The couple just got back from their honeymoon and about half the wedding party (including the groomsman, my friend, and me) had another party. He was being a bit of an ass but was otherwise fine until the end of the night.

We were all leaving and doing the typical goodbyes/hugs and when the groomsman got to my friend, he didn't hug her, and the following exchange happens:

Groomsman: Bye \[wrong name\]

Bride: Her name is \[friend\]

G: Oh! Your other fat friend.

We all just stood in awkward/stunned silence. My friend kind of stumbled away, about to cry. First, we all knew each other by now, he knew her name, and we've all NEVER joked like this before. Second, my friend has serious health issues affecting her weight and it's an extremely sensitive topic. On top of that, she also has brain damage from the radiation treatment of childhood cancer. I'm extremely protective of her.

Me: What did you just say?

G: Her... other fat friend?

Me: Did you seriously just say that? Is that supposed to be a joke? How fucking dare you. You don't know her like that. You apparently didn't even know her name. GO FUCK YOURSELF!

I stormed off and took my friend with me. She thanked me in the car going home because she could not handle that confrontation. So far I've received a lot of various texts about it - the groom just said, "that's the way \[groomsman\] is." The bride thinks I'm an asshole for cursing at him and, again, "thats just the way he is." (btw the bride knows all of our friend's triggers and was even her disability advocate in college!) ironically, the groomsman's girlfriend thinks he went too far and shouldn't have said what he said. the groomsman himself is pissed I yelled at him, doesn't think his joke is a big deal because "we're all fat," so he won't apologize.

ATIA?? my bride friend's reaction hurts the worst. I know I shouldn't have done it at her party, but the dude fucking deserved it.