There are alternative views e.g.
?"I will 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

I know of this quote (its one of my favourites) but also saw this on Facebook this morning - which acted as a reminder in all this - was going to add it here but JJ you beat me to it xx