Religion. For most of my life I’ve seen media both implicitly and explicitly claiming that religion is a fundamental human social need, and that people who aren’t religious are the weird immoral outliers. What I’ve found is true though, is that religion is a primer for believing things contrary to evidence or reason. Faith is often promoted as a virtue in religion, and many aspects of religious thought are fundamentally unverifiable. Once someone starts down the path of believing things without evidence or critical thought, it gets easier to believe things contrary to evidence, and once you get far enough in that you could potentially be convinced to believe anything. You see this with the antivaxers, flat earthers, conspiracy theorists, far right extremists, etc. Many of these beliefs have a root in established religions, if not explicit religious justification. These things aren’t necessarily directly because of religion, people don’t really need religion to believe wacky bigoted shit contrary even to the evidence of their own eyes, but religion by it’s very nature encourages people to be uncritical. Even if the tenets of a religion are objectively good, the uncritical acceptance of ideas can easily start being applied to a person’s own biases, because it’s just so easy. It’s already easy to be uncritical of ideas but practicing it makes it so much worse. Religion is basically taking a major human weakness and promoting it as the height of virtue. Faith is intellectual sloth.