Some people, you just can't help but feel sorry for them. They seem to default to insult in normal conversation, as though that is what they grew up with and that's just all they know.
I work with one of them. She's a manager who grew up in... well, in an area where the residents are widely known for being fault-finding and insulting. She moved to our area fourteen years ago, but she still has the attitude she grew up with in that area. Her daughter also has the default-to-insult conversational trait, indicating it was learned from the mother.
Just today this manager pulled something that took me by surprise. I mentioned in conversation that I got overtime last week. She immediately complaining that I mentioned getting overtime in the presence of people who had not gotten overtime, claiming I was insulting them.
I have worked with this manager for years, but I never have gotten used to her. These days I just shake my head and go on with my job. That's all I know to do.