What to say to Grandma?

[robvalue]

This may be useful: belief isn't a choice. Atheism isn't a choice. Even if you wanted to believe in Jesus being God or whatever again, that's not an option open to you. No amount of people telling you that you're wrong while providing no evidence for that opinion is going to change your beliefs. Also, if God is good, he'd be happy with you living a good life, and wouldn't require you to worship him to prove your worth. If he's not a good god, then why worship him?

If you're going to take action, my advice would be to say you don't want to talk about atheism/religion anymore with her, but you are happy to talk about other subjects. I think it's a perfectly reasonable request. If she refuses, she is being rude, and you're quite within your rights to ignore anything which breaks this request.

Personally I don't want a relationship with anyone, family or otherwise, who wouldn't respect my boundaries. I once had to very politely, then politely, then firmly request a relative stop going on about a particular issue.

But I don't know how you feel about it, nor how your gran would react to such a request.