It’s really easy to get into an entrenched position. And I get why you’re annoyed – it’s thoughtless and rude. However, as a cautionary tale –
My father keeled over and died utterly unexpectedly aged 51. The last words out of his face to me were “I’m really proud of you”… I was a bit sarcastic and flippant back. As things go it’s not a bad last ever conversation, but tbh, I’ve sorely regretted not having responded in kind since. That’s something I’ll never be able to fix.
My point is, that as others have said, life is way to short for petty grievances to get in the way. Is the current argument worth, potentially, a lifetime of regret?