Antagonist: If my ideology is enacted, everything will be better!

Liberal Protagonists: oh fuck how will we deal with this, I have no arguments to defend the status quo

Antagonist: just kidding, all that ideology was a trick, I'm Just Evil™

And then they can kill him without thinking about anything at all. Happens all the time.

Off the top of my head is legend of korra (I know im 2 weeks late for that discourse) the Black Panther movie, and even Pokemon Black/White have the same themes