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
The objectivism comes in with the narrative of the first film pushing the line that only people who are supers should be involved in saving people because they are simply better humans and thus have that right, while having (slightly) egalitarian aims like using technology to enhance and empower regular people and allowing them to save themselves (instead of relying on those who are better than them to be their saviors). They have the right to act how they wish, being better gives them more liberties (to save or not save) than regular people.
The second film presents a counter argument to this idea by saying that superheros have made people complacent and reliant (perhaps reducing their individual rights that objectivists talk about), but that argument is then countered by the filmmakers just repeating the line from the first movie, that it's because they're supers, they're better they deserve to be the ones to act with total authority.
Or something like that, reading objectivist writing smoothes my brain