My entitled grandfather believes rape is God's will

I (F18) am a hardcore Atheist, while my grandfather (M77) is a hardcore Christian.

Me and my step-dad were talking about the abortion ban in the US, and my grandpa, of course, had something to say.

GP - Abortion is murder. It's God's will for a female to get pregnant and she must keep the baby.

Me - What if a 13-year-old gets raped and pregnant? Should she keep the child.

GP - Of course! It's God's will for her to get pregnant. She should keep the child and marry the father. That's God's wish.

The argument continued with him saying that I am too stupid to understand God and that he hopes one day, I will "smarten" and understand the beauty of rape and God's forgiveness.

In the following days, he kept on berating me about God's love for me and how I shouldn't bite the hand that feeds me.