I, uh, I may have skimmed quite a lot of the Waterloo chapters in Les Mis. So I wouldn't know.

The insurrection later on is eventually a bloodbath, but there are also stirring scenes of heroic sacrifice and noble death, and I think a lot of readers (particularly younger readers) feel that the Amis are tragic, romantic, glorious martyrs. So from a certain point of view it makes war (or at least violent uprising?) attractive, even though it's also terrible.