Other people saying the hard r or some swear words are for shock value even if they're not true, since most people laugh off that kind of stuff at nide.
What you said, however the truth, wasn't really something necessary to be said. You could've ignored it, but you decided to be "truthful" for no reason at all, which does come off as extremely narcissistic and toxic.
There's a difference between making a bit of a racist joke (which obviously isn't true for whoever the joke is meant for, which is the reason why it comes off as funny) and "speaking the truth" for no reason at all. Your comment was not funny in nature at all.
You can be a better person man, just stop belittling people over something they're proud of. Let people enjoy things
