Why do you think that is? And education system that teaches history badly if at all? The ubiquity of news programs pushing extreme agendas and the loyalty of so many to one or more of these sources rather than a spectrum of views? The fact that so few Americans are well travelled? A general ignorance of news and current events?
Maybe some of it all. It just doesn’t permeate discussions in the U.S. Maybe after the Cold War ended Americans thought they didn’t need to think about it anymore. But it is alarming on multiple levels.