If you don't like Rarity, I don't like you. I can't like anyone who thinks Rarity deserves to be kidnapped and enslaved. (A lot of people who don't like Rarity said that for A Dog and Pony Show)
Wanting someone to be enslaved is just wrong. If I ever see someone who doesn't like Rarity and still doesn't see her as the villain in A Dog and Pony Show, despite being kidnapped, then my opinions will change. So far, all of them are that way.