"In war you cannot afford the luxury of squeamishness. Either you kill or capture, or you will be captured or killed. We've got to be tough to win, and we've got to be ruthless....tougher and more ruthless than our enemies."
W.E. Fairbairn, 1942.
Since we are dealing with an enemy willing to pay hundreds of thousands of dollars for slitting the throats of Scandinavian cartoon artists, the quotation above is what I believe we should have as an outlook.