Free access to scriptures religious leaders try to censor
Religion is an ideology and an ideology is a system. Some system works and some don’t. Those which works get adopted. I am not a fan of any religion, obviously, but I respect religion enough to know that it’s a system that used to work.
You can make a platoon march out of fear of flying spaghetti monster. However, all major religions have once become a nation’s ideology. All major religions have been used by some politicians to make a large number of people cooperate and conquer less cohesive people.