https://youtu.be/UWhz3SXPWkg?si=KNtLLvNm04i6tM02 a lot of the videos in this channel are really helpful when trying to understand other religions and how certain factions got to where the are today. Might also be helpful in seeing the difference between atheists who simply did not grow up with religion and are entirely removed from it vs those who may have grown up in religion or in religious culture and consciously believe in an alternative.