I am really sorry your grandmother made your life miserable. There are good ways and bad ways to teach tender children about God, the difference between right and wrong, and consequences for choices. Apparently your grandmother did a poor job of it. I don't know if she was a fanatic, crazy and mean or a good person who did her best. Regardless you processed it as abuse. But, because of your exeprience do you believe that it should be illegal to teach that there is an afterlife and consequences for how we live on earth?
That evil woman beat religion into her own kids.
I think it should be illegal to force a religious belief down the throats of others with threats if they don't get 'saved' when there is no verifiable evidence to support that belief.