"Anyone who has accustomed himself to regard the life of any living creature as worthless is in danger of arriving also at the idea of worthless human lives." - Albert Schweitzer
"We cannot have peace among men whose hearts find delight in killing any living creature." - Rachel Carson, American Author and Marine Biologist
"Of all the creatures, man is the most detestable. Of the entire brood, he's the one that possesses malice. He is the only creature that inflicts pain for sport, knowing it to be pain. The fact that man knows right from wrong proves his intellectual superiority to the other creatures; but the fact that he can do wrong proves his moral inferiority to any creature that cannot." - Mark Twain, American Novelist
There are times when killing someone or something is necessary, but I can't imagine ever being delighted over doing so. I can't begin to understand the mind of a terrorist. I will never understand how any sane person can take pleasure in murder or torture.