My Mom is wonderful. She is a devout Christian, knows my beliefs and never ever pushes it on me. She supports me in everything.
You're very fortunate in that your mom is awesome and still here. Give her a hug today and thank her for being a fabulous mom. And seriously, you might think you tell her, and she "knows" what you think, but having you say it will make her day.
I like to say my mom is a Christian but she's not a bitch about it. She has never used her religious beliefs as a hate tool and she accepts my non-belief.
You're lucky. My dad has become a brainwashed right wing methodist and worries that I won't see him again on the other side of the rainbow bridge...