Unintentional or not, when you run your car over someone's mailbox they are going to be upset.
Same idea, instead of getting indignant because you didn't meant to upset someone, you should seek to de-escalate a situation instead of escalating it. Even if it was unintentional, it was hurtful and insensitive to a good deal of people.
Everyone says dumb things from time to time, insensitive things, the problem is you can't get angry at people for trying to point out the insensitivity or even assuming it was intentional.
Clarify and discuss, don't acuse an get indignant over it. If we want to continue to come together as poeple instead of letting our differences divide us, we have to go out of the way to try and understand eachother.
I get you weren't being intentionally inflammatory, it's why I'm trying to discuss things and unwrap all this. We should always be trying to be more understanding, even when humor backfires on us
