Kitchen staff loudly belittling a guest.

I ordered the snack basket and the calamari was off tasting with a bitter taste of it being chared at the end. The chef tried to explain that it was the spices they use and that calamari was supposed to taste that way. The look of the calamari was deeper brown than usual and looked burnt with black flakes. The table I was sitting at was near the kitchen and I could hear the kitchen staff ask why I was being difficult and that I was acting white. The establishment is a very nice one with friendly waitrons but the kitchen staff are a totally different story. Even the chef was rude and came out with an attitude.