[JohnFen]

It's human nature to think that our personal experience and worldview is representative of the general population, even though it almost never actually is. It's a thing we have to consciously be on guard about.

"We tend to mistake the limits of our vision for the limits of the world."

If you allow the misperception to take hold, it's a short step to concluding that anyone who isn't like you is weird or wrong in some way.