I don't think she's saying she's against gay marriage. I think she's saying that people condemn her for the things she's done in her life that are considered "unholy," but we're in a world where a lot of other things that are considered "unholy" are being legalized and seen as "right." Y'all know Fantasia just learned how to read and write.
This is the final nail in the illiterate coffin for her. Not only does her music suck, but she also looks like a ****ing trout and her personality is ****.