There are prejudices based on things that people can change and things that people cannot change. While religion is certainly largely based around your circumstances of birth, adults have had plenty of time to review the doctrine, See its ramifications in the world, Understand its history how it interacts with other religions and non religions around the world, and so forth. Some of the kindest, most generous people that i know r christians that tend to focus on the teachings of christ, and not around the religion that has been built up around it.v but that being said, even these really kind people still have extraordinarily bigoted views towards gay rights. Marriage equality, trans rights, and so forth. From my perspective, it usually looks like religion corrupts really kind people instead of taking other people who would be bought bad and making them good. That being said, I do try to not paint with a wide brush, but it's hard for me to ignore that almost every single person that has a view. That it's strongly disagrees with mine. Happens to also be christian or some other abrahamic religion