I am sorry Transform. I had a so-called friend go nutso on me a while back and when I was done with the whole thing over it..she said "but I only said all that the one time."
duh. so? what you are allowed 3 strikes before you are out? Nope. Below belt hits and personal blows are just telling me where you are at, how you think and what I can expect and why on earth would you expect to be able to get a free pass for treating someone so badly?
Someone wants to tell me they hate me? okay..go on then and find someone you like.
You are not crazy to choose not to allow someone to treat you poorly no matter what. I've no idea what to do in a business situation other than re-draw the circles, keep it business only and look for a plan B.