My (perhaps stupid) theory about PD killer

You know. I was just thinking, if The Diamonds aren't sister and everybody ship Blue and Yellow Diamond, so why don't ship Pink with White. Then it hit me. What if White felt affection for Pink but she couldn't return felling. Like" I love you too, White, but not the way you love me. You are like a sister for me. I'm so sorry." Just imagine that. You are perhaps the most powerful being in the whole universe. Every creature would die for 1 second of your attention. And when you finally fell in love with somebody she just REFUSE!!! You try to get near her, to show convince to her of your true love but she can't return your felling. You are full of sadness and rage. You want to get your revenge for this abasement. Meanwhile on Earth the rebellion has started. What a great occasion! You go to Earth and shatter her ( not without tears). You change memories of every witness that they saw Rose Quartz, not you. You also change memories of Rose that she did it. When everything was done you came back Homeworld.