So mom and dad found out I'm an atheist, and now refuses to talk to me until either I convert, or pay lip service to Christianity . I'm Not going to be something I'm not, but these are the people who raised me and gave me love.... My heart is broken.
Think about it, you will come to an understanding. The love they gave you, are you sure?
Just because you are related to them does not mean you have to like their crappy attitude! Point out they are choosing to ditch you, their child, and what would jeezus say about that?
Then remove yourself & let them come to you, or not........meanwhile, find like- minded people to hang out with. Good luck!