I wanted to touch on this in my prior post on the subject but I had to go to work, so follow up thought re: the whole idea of Blue Diamond taking the role of Maleficent in The Answer’s “Sleeping Beauty” vibe.
So, ignoring what Disney did in the adaptation Maleficent and just looking at the original movie, Maleficent does not pick a fight with Philip and Aurora initially due to anything that’s actually their fault. She challenges the King and Queen- Aurora’s parents- because they refused to invite her to the christening, basically insulting her honor. And then, in a rather villainous fashion, she proceeds to overreact violently to this slight.
“Someone who overreacts violently to perceived wrongs against them” is a trait shared prominently by Blue Diamond, Lapis, and the Lighthouse Gem.
Blue Diamond promising execution for Ruby fusing with Sapphire, which she takes as a personal insult: “with a member of my court.”
Lapis’s first dialogue to anyone besides Steven is accusing the Crystal Gems of imprisoning her, refusing to help her, and ignoring her plight. She rapidly follows this up by hitting them with a giant water hand.
Arguably, a lot more could be said about Lapis as this is actively discussed and a fair part of her character arc at this point seems to be her realizing and acknowledging this trait: her tendency to play judge, jury, and executioner in one fell swoop without considering her judgments might be wrong and people, even people who are unpleasant or who have legitimately hurt her- might not deserve her undying enmity.
And then Lighthouse Gem, who, seemingly reacting to a combination of Lars carving his name into the wall and Lars’ abandonment of Ronaldo, held a grudge for years and manipulated Ronaldo into trying to kill him.
(We also see, from Sapphire in Keystone Motel, and Aquamarine in Stuck Together, that this is not some kind of archetypal blue gem trait, either- both of them are faced with wrongdoing against them and both, without outside incentive or prompting, take the stance that the best thing to do is drop the issue)