>We see the asteroid fired at Earth.

No, we don't. The bugs have no technology. How could they send an asteroid from light-years away with enough speed and accuracy to hit Earth on any reasonable timeframe? It's not even a good lie. It's a story that strains credulity the second you actually think about its logistics. The only reason you believe it is that characters in the movie say it.

>We see Buenos Aires destroyed.

Sure, but asteroids also have natural origins. The government coopts the disaster for their own ends in an obvious mirroring of the Reichstag fire. The true cause of the destruction is irrelevant, the only thing that matters is what the crisis can be used to justify.

>We see the bugs killing the humans.

Sure, after the humans invade the bugs home. If you go on a hike, find a beehive, and then start poking it with a stick, no rational person would blame the bees for stinging you.

>Calling the characters "fascists" because they use fascist aesthetics is basically acting like an LLM. It's only engaging with the surface detail without having a solid world-model to back up your thoughts.

The government portrayed in the movie is fascistic because it shows a society that is entirely governed by military might and structure. The classroom scenes at the beginning of the movie discuss the failure of democracy and how that led to veterans taking control through force. We are also repeatedly told that basic rights of citizenship are only awarded to veterans. When they're at boot camp and all going around explaining their reasons for joining the military, one person says she wants to start a family and military service is the best path to getting a license for it. This is a highly structured and totalitarian society ruled by a military class. How would you describe that if it isn't "fascism"?

Once again, you seem to be guilty of the same thing you're accusing me of doing. The only evidence that this isn't a fascist society is the surface-level details of things like a bunch of happy high school students. Any discussion of the actual society they live in paints a clear picture of fascism.

>The bugs have no technology.

The bugs are shown firing projectiles to orbit. This is a setting with FTL travel; it's clearly not hard sci-fi. By the standard narrative conventions of soft sci-fi action movies, the bugs are capable of firing asteroids at Earth.

>The true cause of the destruction is irrelevant

It's critically important to the ethical justification for military response. According to the information actually presented in the movie, the destruction was deliberate murder of millions of civilians. Any other interpretation is fan-fiction.

>no rational person would blame the bees for stinging you.

They'd blame them for killing everybody they know. And that initial provocation was not the fault of the United Citizen Federation.

>Any discussion of the actual society they live in paints a clear picture of fascism.

It has objectively more freedom in times of war than any real life society.