This, more than perhaps anything, is what kills me about the PT and all its political shenanigans: it completely undermines the moral righteousness of the Rebellion. We never see an Old Republic that's really worth fighting to restore. If it ever existed, it's long gone by the time TPM begins. Before the PT came out, we could imagine the Republic as a great democracy, a shining beacon of freedom, that the Rebels in the OT are fighting to restore. After the PT, the Rebels are a bunch of fools, fighting to restore a government arguably more corrupt than the Empire itself. The triumph of RotJ's finale is destroyed. EDIT: It also brought things far too close to home with all the politics. In other words, it turned Star Wars into exactly the opposite of what even Lucas maintains it was meant to be - an escapist fairy tale for a generation (originally, those who grew up with Vietnam and Watergate) who didn't have stories with easy happy endings.