It's not about the literal beliefs of religions. It's about having a 'tribe' or in-group. That was helpful to our survival as a species, and that instinct has

It's not about the literal beliefs of religions. It's about having a 'tribe' or in-group. That was helpful to our survival as a species, and that instinct has not gone away. If it's not religion, it's political ideology, national identity, ethnicity, or allegiance to a football team. We love defining the world in terms of 'us' and 'others.' The trick is in finding a way to live (and dare I say work) in proximity with 'others.'