Yes, there are quite a few survivors and mostly joined Luke's new Jedi Order later, some even lived till the Legacy Era. No, but they say they are good, they ask people to sacrifice everything for "greater good" like the nation's stability then equal themselves to it. Did these people ask others to sacrifice everything for it? Did they push someone to kill their own parent? Obi Wan and Yoda were pushing Luke to do it. So you know it's not right. He did crime, but he had good in him as well. And that is the truth. Actually they adapt little children to raise them as Jedi, when they didn't have a choice. When they talk about Sith they also don't give others a choice, he's Sith so he must be evil. Yes they did, and far worse they once were trying to annihilate everyone who has a Sith ancestry.