Sure, I get that as well. I see how people can draw a parallel between this issue and racism. But they're not the same IMO.
It's not as if AfroKitten said she had any personal feelings
about gays or said anything about gays themselves at all. She, presumably, is basing her views on her religious beliefs.
Racism OTOH is usually based on hatred, an intense emotional dislike. It's not generally based on morality or a belief system.
ETA: I don't see AK's post as "full of hatred."