"If you cannot confront evil when it has said it seeks to hunt you down and kill you, I don't know what will force such."
Think of Nick Berg, God rest his soul.
Raised by an American-hating American Jew, whom to this very day slanders America as being "the real terrorist," he was completely unequipped to understand the venal muderousness of the Muslims.
His Western acquaintances in Baghdad thought he was utterly off his rocker, cruising around Baghdad and elsewhere in taxicabs and with no security whatsoever. Apparently Nick thought he could reason himself out of any difficulty.
We know the rest, and that is how far some must go to finally understand the danger.
He died a brutal, heart-wrenching death. It caused me to weep for him, as it did others. But I think that it's entirely likely that even then, he didn't think of them as evil. The whole situation probably didn't even compute in his mind.
There have been plenty of blatant, clear, black-and-white, obvious evidences of the evils that we face. Yet the left continues to vehemently, even violently deny their existence. I believe that, for many of them, their blindness is willful, stubborn and complete.