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There is often a neo-tribalistic mentality.

"My tribe is better than your tribe"

Some people thrive inside this mentality, whole others don't go near it.

Not everyone is thinking like this but a lot of people do. So because of that it's a common heuristic to think of it as "war" because there are some people who do that gladly.

It doesn't and I never said anything about preferences directly. There are however culture wars, and they cause problems throughout the industry and discipline.