I'm going to tell people to stop trying to preach to me to be a christian again
Do a lot of people try to preach to you?
I've got enough of Christian assholes who are trying to persuade
It can be rude to tell people to stop doing something but in this case they are not respecting that you don't want to be preached at. You can tell them to stop since you don't want it.
What, are you preaching to me now?
No, I'm only letting you know that you're justified in talking to them about their behavior. You shouldn't have to deal with other people trying to convert you if you don't want their religion. Freedom of religion is it right and they should be respectful of that.