Belief is social. If you’re surrounded by people that all believe a thing, you’re more likely to also believe. If challenged on something that threatens group membership, your brain reacts like it’s a physical threat. Group membership is that important. Facts matter far less.

This happens to everyone.

Religion works on emotions, which are easy. Knowledge works on thinking, which is hard.

Have you heard of the fireplace delusion? Burning wood is horrible for our health and the environment, but most of us have fond memories of sitting by a fire. Religion is the same. Holiday traditions with family, organized events marking important life events, it’s hard to break away.

https://www.samharris.org/blog/the-fireplace-delusion