We're in a bit of a sticky situation. Nationalism is very unpopular now, and people have a general distrust of our government and its institutions. That is reflected in these movies, where the enemy is actually their own organization, where it would have been a foreign enemy in the past, like an actual enemy of our country. But then the depiction of the government institutions as untrustworthy in so many movies fuels people's distrust of the government to the point where now the only stories that people will believe are where the hero is fighting internal powers. It's a bit of circular reinforcement.