Quote Originally Posted by Spetulhu
What's so odd about killing people you don't know? Humans do it all the time. Give a man a cause to fight for and he'll commit actions of violence against those who stand in his way. Hey, he's on the right side! It's justified. Besides, they deserved it.

Why do soldiers think it's OK to kill people they've never met? Artillery and airforce don't even see the people they kill in the name of their country. They're on the right side, fighting the enemy.

Why do terrorists think it's OK to kill people they've never met? Same thinking, probably. They're on the right side, fighting the enemy.
It is not as simple as that. Artillery and bombers can kill because they do not see the enemy. And if you ever read the stories of allied bomber pilots you see that they had big problems when they saw the burning towns.
Infantry kills for two reasons. First, they are afraid. Second, they do because their commrades do.
I know that the criminal bomb attack on London is not unique. But I do not understand it.