There wasn’t really a droid faction, though; they were just the slaves of the organics. If the Old Republic had still had a grip on morality, they would have had a problem with creating clones to fight and die for them, but they had apparently become so lazy they relied entirely on the Jedi for peacekeeping and didn’t even have a standing military at the time. (The Old Republic at, say, the era of the Knights of the Old Republic games and comics is much less decadent, and I would argue that they were good guys at that time.)