I respectfully disagree. No, the masses don't need to know what war is like. Part of the whole idea of defending them is that they don't have to know what war is like. And on the flips side they haven't...earned...the right to say they know whats like either, as odd as that may sound.
They should understand some things of course, how bad it can be, the cost of it, they should understand the principle of these things. But to know what it feels like, to know what war is like as if they experienced it.
No, I think war movies were perfectly fine when they were stories, not documentaries.
Well, maybe "need to know" was a strong choice of words.
They should definitely know what sort of sacrifices the men and women serving make.
There's this thing that comes to mind... "The Citizens of the US can sleep peacefully at night because there are men and women ready to do violence on their behalf" - or something such. While this particular quote refers to the USA, you can swap that for nearly any country in the world.
The reason I'm saying it here is, I agree with it.
I do not know what war is like (I know enough to know it's nothing nice, but that is about the extent of the stuff I think I REALLY know) and I'm glad for that. Much easier to live without certain doom looming overhead every few days in the form of bomber formations.