Am I a cunt for not giving my coworker my regulars?

I'm a server and got someone who comes in every Saturday and now they always ask for me. It's a father and son. When they first came here they were sat with one of my coworkers but she asked me to take the table because of a tattoo the father has. He has a pentagram tattoo. She said she refuses to serve anyone who worships the devil. I'm an ex Christian and just spreading a little education. It takes two seconds of research to learn that a pentagram actually has nothing to do with Satan at all. But regardless I took him. He was very nice. His son is so sweet. They spent like $40 dollars and tipped me $150. She was talking very badly about the dad and how if he's not with his sons mom she hopes the mom has full custody and how people like that shouldn't be allowed in here. I found out the next time they were here that he heard everything she said. He didn't want to say anything because he didn't want to risk her job but thanked me for not being judgemental. So every time they come it's a $150 dollar tip for me. When she found out how much I was getting tipped she started asking the host to put them in her section. The host said they specifically requested me so she started coming up to me asking if I would be okay if she takes them. I said no they are my regulars and she through a temper tantrum to the boss about it and he did nothing. I thought he was evil and satanic and you don't wanna serve someone like that. I overheard her telling other servers I'm such a cunt.

Edit: Wanted to clear up a few things. Why I mentioned being an ex Christian. I probably should have worded it better but even when I was Christian I knew that the pentagram actually has nothing to do with Satan. I did my own research. It's like the upside down cross isn't satanic at all and Hollywood and movies are why people tend to start correlating the two. Also after getting to know the guy he's not a Satanist anyway. His tattoo of the pentagram has the element on it. Air, fire, earth, water and spirit. It's nothing religious, it's just an art piece.