[jernfrost]

"The proportion of foreign-born people is higher in the San Francisco area than anywhere else in the United States"

Doesn't really change anything. The point is that like most of us Europeans will point out. Americans are rather insular in general. Doesn't matter if you live in SF or not. Americans don't pay much attention to what is going on outside of their bubble. Also they tend to lack curiosity about the world outside.

Even foreign born Americans seem to end up like that. I've met Americans originally born and raised in Sweden but where utterly clueless about what Sweden is like in general or is like today.

At least in northern Europe which I know best, discussing politics and world affairs at the lunch table is rather common. When bought by an American company it was obvious things were different when one of the instruction was "don't talk politics or religion at work!"