[olau]

Another side of this is that when people are confronted with someone doing things different from what they're used to, their innate ego centrism makes them react if it is about them. It reopens the identity crisis of their teenage years.

I once experienced this on the board of a kindergarten. There was a public debate about whether kindergartens should have computers or not. The kindergarten I had my kids in thought not, for good reasons. When talking to the other parents, with some those reasons clicked immediately. But many were simply not able to digest them. They were stuck thinking about their own situation as parents and the fact that their children were using tablets at home. Big parenting identity crisis, no constructive discussion possible.