people have never really believed in god...they just do whatever needs to be done out of convenience
take the Greeks or Romans for example, they had tons of gods & worshiped them, but they knew they weren't real
the same could be said for any religion, some people just need to feel that there is someone out there looking out for their wellbeing...but no one really believes, if they did they would follow whatever rules this god puts out. but most people do whatever the fuck they want
even christians adopted a bunch of pagan rituals & beliefs to appeal to a greater public...everything depends on what's convenient