We are social and tribal creatures. That is how we became so successful in the first place. Religion is just another form of tribalism, the ultimate appeal to authority, the ultimate fount of knowledge, the ultimate wise tribal elder sitting in judgement. A vestigial, pre-historical solution to a pre-historical need but hey, the instinct runs deep.
Of course the problem isn’t religion per se, but dogma. it just so happens that many religions remain dogmatic at their core and when that dogma maintains that you have the divine, supernatural, omnipotent, omnipresent, omniscient being on your side…well anything goes. Inciting people to violence at the behest of a god is child’s play…why the hell would you refuse to do their will? Who the hell do you think you are?
The same of course goes for any ideology that demands absolute adherence.
Leader worship cults as seen in North Korea, Stalinist Russia, Nazi Germany, Cambodia, Maoist China…they are functionally no different to traditional religion other than their infallible leader is earthbound rather than celestial.
So to me, the less dogmatic and less ideological a religion or worldview is, the better. That’s why such as Humanism, Jainism or Quakerism are far harder to twist into weapons of terror…Christianity, Islam, Judaism?..far too much explicit and implicit hate, terror, bigotry and judgement bound up in obviously error-strewn ancient texts for my liking.
Sure, adherents can interpret those religions in their own, harmless way and billions do but for the power-mongers and hate-peddlers there is plenty of vitriolic raw material for them to use to their own ends. (and it is divine remember!)
It is a shorter walk from the Talmud, Koran, Bible. little red book or Mein Kampf to the gas chambers or the salt mines than it is from the principles of humanism.