*spoilers* the greatest threat/salvation

Not a political party or a nation...but one person.

That is perhaps the scariest part of this movie. The near-triumph of a 'wolf in sheep's clothing', a real monster, to put themselves (or their son in this case) in a position to destroy the world, as twisted revenge for their son's predicament which they were involved in to begin with. The real triumph being that one son who stopped her.