I understand completely where you are coming from STEMO and I think most of us would love to not have to think of wars ever again.
But, unfortunately, man loves to war, and especially the Muslim children you mention will think of the wars going on currently in much of the eastern Islamic world. For all children (and at the bottom of my post I explained I wanted to say "f-e-c-k-l-e-s-s, but the OOF didn't want to show that word!) they do need to know what war is, the awful truth about the biggest mistake mankind can make, and what exactly it does to everyone involved. Then, MAYBE, the new generations will not repeat the errors of history and highlight to them that it is the young who have to fight and suffer the most. No more do we want war glamourised, so that young men join up in 100's of thousands to have a "jolly" and "exciting" war against who ever our country has fallen out with and failed, diplomatically, to resolve the major issues. That is what happened in 1914 as young men were excited about having a go at the Hun, with it all being over before that Christmas!
Imagine a world again, without the knowledge of the effects of war, going joyfully to war as the young have never been taught what can happen in a day, let alone over years, with 20,000 of their kind killed in one day, and in future wars possibly millions in a day.
When children are old enough they need to know the horrors; maybe then we can eradicate that form of extended diplomacy, but only if everyone continues to understand what war is.
That is my opinion coming from a military family who suffered war losses, and also fully understands what my pacifist, but a senior Royal Navy NCO, believed after having his father blown to bits by a German bomb. He always said it was better to be red than dead, but wanted all the young to understand the terrors of war.