Some people just can't let go of false narratives once they've bought into them. Some people won't let go of the "overpopulation" myth despite all the evidence proving it is a non-crisis. The global warming panic is just a mutation of "The Next Ice Age!" scare of the 70s. Likewise, some people can't/don't want to let go of the "America is always the bad guy" mantra because some ahole college professor once made them believe that holding this position in and of itself makes the holder "intellectual." The 'America as policeman' notion is just an off-shoot of this. We are not an empire.