The enemy is someone who is willing to die in order to kill you.

Head chopping barbarians remind me what real enemies do.  Fake enemies  disagree about cupcakes in school lunches and pipeline rights-of-way, stuff like that.  "While it is true that the Enemy always hates us for a reason — it is his reason, and not our's.   The quote below is borrowed from Instapundit from Harris's "Civiilization And Its Enemies":

"Forgetfulness occurs when those who have been long inured to civilized order can no longer remember a time in which they had to wonder whether their crops would grow to maturity without being stolen or their children sold into slavery by a victorious foe.
…
They forget that in time of danger, in the face of the Enemy, they must trust and confide in each other, or perish.
They forget, in short, that there has ever been a category of human experience called the Enemy. And that, before 9/11, was what had happened to us. The very concept of the Enemy had been banished from our moral and political vocabulary. An enemy was just a friend we hadn’t done enough for — yet. Or perhaps there had been a misunderstanding, or an oversight on our part — something that we could correct. And this means that that our first task is that we must try to grasp what the concept of the Enemy really means.
The Enemy is someone who is willing to die in order to kill you. And while it is true that the Enemy always hates us for a reason — it is his reason, and not ours".

And for dessert, this thought from Ace of Spades HQ:.

Do the world's Muslims want their contribution and legacy to the 21st century to be murder and rape?  That question does not call for collective punishment. However, it does leave open the question of whether or not Muslims should feel ashamed for the murderous impulses many of their coreligionists feel.