If you are so insecure about your sexual identity that you can’t handle some dumb kid posting funny images on the internet, then you probably need to rethink some of the choices you made in life.
If it’s more than just dumb memes, actually harassment or targeted hated, then take it up with the admins.
But you are just assuming, you have no proof of this kind of posts on c/christians. They were not banned because of content, but because of not allowing pro LGBTQ+ content. Please read the linked post first. (https://lemmy.world/post/1762563)