Hmm, you completely lost me at "little green men". What/who is this referring to? Extraterrestrials?
https://en.wikipedia.org/wiki/Russian_occupation_of_Crimea
I guess it's now being used as pejorative against groups of vaguely military style. Like the DHS agents conducting Metro Surge.
(They haven't responded, and I've been downvoted for even asking the question. I am genuinely confused. I'll admit I don't follow this all very closely, but I want to understand what the phrase means here.)
That said, I described them as such because I considered the comparison to a masked and armed force of nebulous origin and ambiguous intention apt.
https://en.wikipedia.org/wiki/Little_green_men_(Russo-Ukrain...