Any business/person should be able to make up their own mind as to what customers or clients they do or don’t want. I certainly don’t want to put up with abuse from an overbearing asshat -so I don’t. My choice, nobody else’s business.
They should. But thanks to a litigious society and some poorly defined laws you have to be careful how you inform them you don’t want anything to do with them. There are certain word and phrases you can’t use, any sentence that starts with “because you’re” is high on that list because the next words are almost certainly going to tie to a protected minority (even “overbearing asshat”, could be the result of a mental condition, can’t discriminate against the insane). Nothing new about this, it’s why in right to work states where you can fire someone for “cause” you ALWAYS do, never list a reason that could be challenged in court. It’s a messed up system out there and the path to survival is to know the dance and never deviate.