“I mourn the loss of thousands of precious lives, but I will not rejoice in the death of one, not even an enemy. Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that”
Martin Luther King, Jr.*
*apparently it is not actually all his words, but I think the sentiment is right. And it certainly accords with my thinking.