Some people hate foreigners and other strangers, and especially those whom they have never met. "I don't know him, so he cannot be but bad."
They stay at home all their life, hating those who live somewhere else and all those stupid foreigners who approach the little fortification they have created to protect themselves.
All those people are not like them, so they are bad. Hate them, hate them, hate them!
But they are not stupid. They will never go away from home.
If they stepped out of their limits wouldn't they be strangers among strangers themselves?