I'm not going to allow my son to go to church with his friend anymore
Why don't you want your son to go to church with his friends?
I don't like the idea of my child and his friends going to an old and dark Church.
I get you just want your son to be safe, but you shouldn't limit his experiences and childhood. He could get some great memories out of this and it would be wrong to prevent all of that.
I am scared he might also be cursed by the god of that church.
It is good to be concerned for your kids. But you should not ban something unless you have an actual good reason to with evidence.