system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come a large portion of African Americans are such devout Christians?
gpt
The religion gave them faith in a better future during slavery, and it has been passed on culturally from mother to son, father to daughter. They weren't allowed to practice any of their native faiths, and since slaves came from many diverse tribes none of them would have had the same religions, so Christianity took on very well with slaves. 

It's a religion that's all about being oppressed after all.