I think his meaning is beside the point. The fact is that ISIL is a threat to international peace. So is every terrorist organisation. Any person who belongs to such a group forfeits their life, at least in my book, and so does anyone who tries to help them remain alive. So it is up to Western Civilisation once again to keep the world safe and kill off animals like ISIL, Boko Haram, Al Quaeda, Hamas, and so-forth. If they exist, they are to be completely eliminated. Not just silenced. Smashed.
Tolstoy was an idealist. There is no room for idealism in war. When you are fighting a just war, you do what you have to do. You kill until you get a surrender, and you keep killing until you force the enemy to do exactly what they are told. Until the point comes that you say "Jump!" and they only ask "How high?" and then jump, you kill them, and you keep killing them. I don't care how many of them you have to eliminate. They crucify dead bodies. They execute Seventh Graders (or maybe you missed that CNN story a few weeks back). Therefore, they do not deserve to live. Until they learn to be ground under boot heels and be silent and obedient, they die, and should continue to die.
Other Muslims, if they wish to be left alone and secure in their persons and effects, should simply shut up, and learn from the experience of these animals. But I expect that most Muslim civilians would probably end up appreciating it. If they don't, and start any shit with us later, we go back, and do the same thing to them later. If that means we keep a permanent military presence in that part of the world, and about every ten years we just pound the shit out of the place, then so be it. Good way to ensure full employment. Reintroduce the draft, so you have a steady supply of soldiers, so there are plenty of positions back home in the factories and other workplaces, thus bringing down unemployment. It would maintain the military-industrial complex by which the economy is greased, which would maintain stability, as long as it did not get out of control.
So many benefits could be had from it. Grant it, we would lose lives, that is fundamental to the military, but welcome to real world. Shit happens.