From the Guardian
Compassion is putting yourself in the other person's shoes and feeling sympathy. It does not require affection. One might feel compassion for Hitler, Stalin or Saddam on learning about their appalling childhoods (like most famous dictators, they lost a parent before the age of 14), or even for George Bush (who had a beastly time), but still hate them for what they did.
I really need to move to a new planet.............no, no, seriously
Hat tip: Chas M