People believe the lie because it makes them feel good.
These people don't use religion as a guide to a better life, they use it as an excuse for bad behavior.
Yup. Evil people will use their evil religions as an excuse to be evil. The "pro-life" movement is generally speaking a very dishonest movement. They are really anti choice. Even the name "pro life" is a dishonest. If they supposedly were protecting life they'd be helping people get healthcare, preventing gun violence, helping immigrants, and would never support war. Instead they want to pretend that getting an abortion is taking a life. Something that no medial profession, law, or legal system says is true. So when the racist liar gets on stage and feeds them lies they want to hear they go along with it.
There should be an effort to brand Trump as the face of the pro life movement. It's a fitting match up.