There wasn’t much moral ambiguity in the original version of the Insurrectionists as they were usually insane terrorists to a level the book was using to justify kidnapping children to turn into super solider with brutal unethical experiments and then had them conveniently fuck off when the war with the Covenant got started so the Spartans don’t have to do any morally ambiguous shit.
I mean, it shows the UNSC is a bunch of scumbags and if there's a resistance to them then it's probably justified.
And it's hard to be a colonial resistance when all the colonies have been destroyed.