A slight issue I have with vampires

I won't pretend I'm not a fan of some vampire novels, TV shows, and movies. I am. I like the idea of vampires, I like the rather strange, twisted places you can go with them.

But one thing that no writer, creator, artist, moviemaker or other such creature has explained to me is why crosses are deadly to vampires, but no other religious symbols are. A Star of David, a Star and Crescent, the image of the Buddha and all the other sacred icons of other religions are completely ineffective, but the cross does the magic trick where the undead are concerned?

Does anyone else taste the rancid flavor of bigotry inherent in that? Because I do.

( Discussion of lack of diversity in some urban fantasy, particularly with vampires, and why I think this is a bad thing )