He was more talking about US public opinion vs US government opinion. What he is trying to suggest is that it is more the bipartisan US political elite that is high on imperialism, while the population is isolationist - whether for the right (leave the world alone, let Europe solve Europe's problems) or wrong (fucking Europeans didn't help us in Iraq) reasons is not his point.

_{*Lunatic*, n.
One whose delusions are out of fashion.}