I never said I believed they were. I just said it was something to think about. As for whether or not I think they're evil. I don't actually believe there is such thing as good and evil. People always think they are the good guys no matter what they've done. Who is to say if they are good or evil?
Let's just set up an example. You are walking home when you see 4 men stabbing another person to death. You kill the 4 men and take the person being stabbed to a hospital. Are you a hero because you saved an innocent man? Or are you a bad person because you killed 4 people. That's 3 more deaths than if you left the situation alone. To me, good and evil is just a single person's interpretation. To the person you saved you are the hero. To the 4 men you killed families you are a villain. So. Hero or villain?
The Crystal Gems saved Earth. However they also started a rebellion which killed a lot of Gems. Which is more important? Just something to think about. I am not trying to get you take my opinion. Sorry for the lengthy reply.
About the evil pearl theory. I would like to point out that the diamond on pearl's space suit is, in fact, pink. This may signify rose quarts. Also the other image where there is a diamond on pearl is from the un-aired pilot, meaning it doesn't connect with the rest of the shows plot line. If you need more evidence for the space suit, it is probably the only one she owns, because that is the suit she came to earth in, and at that time rose quarts was probably still pink diamond