Okay, twice in two weeks I've run into "I wasn't being offensive, you are" when calling someone out on being offensive?

And so... just a general reminder that it's not on you to decide if something you said was offensive. You can decide if it was MEANT to offend, but not whether it did. The appropriate thing to do when called out is apologize and reflect on what you said. If you don't see it, you can ask for an explanation, but remember that it's not the job of marginalized people to educate you when you have google.