Seems reasonable (although clearly not the intent of the story and not a deliberate “false flag”)
The movie's goal is showing the attractiveness of fascism and showing that people like you are incredibly open to fascist ideologies as long as the fascists have a scary "other" to put forward as an existential threat regardless of how real that threat truly is.
There's no frame story to support this. Going by the available evidence in the movie itself, it's a conventional action movie.
There definitely is. No one on screen looks into camera and says this directly, but the whole recurring "Would you like to know more?" bit is supposed to tip the viewer off that what they're watching is a product of the government's propaganda efforts.
I truly don't know how you can watch this [1] and conclude we're meant to fully trust them as the 100% honest truth.