It is no revelation to note that regimes will sometimes use a foreign enemy to rally a population around a ruler--perhaps getting the people to accept (or demand) emergency powers for their own protection from that enemy.
Today's progressives are too pacifist for that, so what's a progressive to do when they want to control our lives? Well, identifying an enemy is still the best way. Which is why I fundamentally mistrust the whole global warming scare. Progressives have identified a problem based on computer models so far in the future that it is impossible to disprove. And the solutions to the problem are to empower them to control virtually every aspect of our lives to defend the planet from us.
Even if it is just a figurative thing, there will be people lined up against the wall and shot for being an enemy of the planet if the global warming extremists get their way.