Let me share a story with you all about what is and is not rude.
I have a family member who for 20+ years was a male. this last year he identified himself as transgender and asked to be called by female pronouns. We obliged. In one conversation I had with "his/her" fiance, I forgot and started out with her and she then missed one and said he. I was accused of being horrible, abusive, rude, disrespectful, and otherwise a nasty individual because I forgot one time after 20 + years of conditioning.
I attempted to explain that it was not intentional, that it was just a slip after 20+ years of using one pronoun and I simply made an honest mistake, I apologize. and the insults flared again and got more vial.
Here is the point. Just because someone acts badly to you does not give them the right to act badly in return, but not everyone someone claims is rude really is rude at all. You all are upset because I called you out on bad behavior, I get that, but believer or not, that does not mean I was rude. You see, rude behavior is not considered rude because someone doesn't like what you said or did. IOW"s forgetting one time to use a different pronoun after over 20 years is not rude just because someone was offended. Rude behavior goes much deeper than that.