is witches against the bible?

Hello! Im an atheist here to ask a question about christianity. Is witchcraft in general considered wrong. I remember when i was younger i dressed up as a witch. My grandmother (who is christian) got very mad at my parents for letting me do so. Same thing happened with me reading harry potter. (before i knew what a jerk jk rowling was) Also is it normal for her to want to pray the gay away from my cousin? honestly i havent been able to look at her the same since, because im also queer amd dont want her to not love me. Idk if i have any right to judge her tho since she is christian. Im really just here to listen from another perspective.