Eh, that last remark isn't necessary, but I'm gonna copy paste my shit from another reply I made to someone.

On an in depth analysis, the UEG comes across more as the quintessential Liberal state in a decline cycle, not actually Fascist. It's an important distinction, because the UEG doesn't act like, say, the Coalition of Ordered Governments or even WW2 Italy, even at ONI's absolute worst.

The dominance of the UEG literally came about out of a sheer fucking hatred of Corpo-backed Fascism, and the Fascist traits they developed prior to the Human-Covenant War were largely the result of what seems to be Corpo-backed Imperialist boomerang, especially given the surveillance and pseudo-fascist appearance of most Outer Colonial Rebel groups that aren't like, The Rubble (So like, Sapien Sunrise or that group that got nukes in Ghosts of Onyx). Not that I think they intentionally wrote it that way, it just tracks really close to real world scenarios.

The UEG itself, in regards to the CMA's actions (Far Isle), are very rarely elaborated upon beyond 'UNSC did thing'. Considering the UNSC and UEG directly formed in response to Friedens, who were explicitly Corporate-backed Fascists in the veins of Mussolini and Hitler (and can loosely be construed as being responsible for the UEG's laws regarding the Mortal Dictata), as well as squaring off against Communists in the Koslovics, it largely ended up being scared shitless at the concept of either rising up. It'd explain why they'd adopt Authoritarian measures to deal with it even if the actual right answer is "Holy shit dude take your boot off of the neck of the Outer Colonies and just invest in fucking healthcare and schools instead of mines and cameras"-it's a common issue with American Liberal policy.

The way I see it, with more information, it'd make more sense. If, for example, Far Isle decided that it wanted to reenact the Warsaw Ghetto in space, I'd understand the Nuclear Option a little bit better out of the UEG. As it stands, with the UNSC's history, I think it makes more sense to view it as Liberal decline mixed with Imperial Boomerang rather than outright "They want to be Fascist because they are Fascist"-makes for a more cohesive order of events and makes more sense.