The difference between terrorists and freedom fighters is whether they're aligned with my views. When it's the government making the distinction, the difference is whether they're aligned with the government's views.
Furthermore, a rebellion or freedom fighters in a moral framework is when you have an authoritarian regime, aka “the monster that comes for us all” (Andor S2) that needs to be overcome.
An authoritarian regime has no representation of the population, has no need for feedback, and is ruled by a few. In the work of Thomas Payne he says “When all rights have been taken away, the right of rebellion has been made perfect.”
War. It's called war. In ye olden days, military forces pillaged farms (for food) and sacked cities (for loot). Rarely, there have been short eras of formalized military v military conflicts within various cultures, but this was not the norm. In more modern times, military forces destroys enemy infrastructure to degrade their ability to make war directly target civilians to reduce the # of enemies and hurt morale (supposedly). While sad, one of the facts of life is that war leads to civilian deaths. Usually far more than direct military deaths.
