Dude, it's kids. Their mind isn't set in stone, their opinions aren't very founded. Basic military service also includes ethical/political education. People are not getting packed into trenches yet, it's not prison. If anything, this is going to help tensions in society. They will share rooms, showers, dirt and sweat. We're all the same. Nothing has been shown more effective at tearing down prejudices than actual exposure and confrontation.
> People are not getting packed into trenches yet, it's not prison
Yet. And no it is not prison. Is forced labour and death so that some assholes make more profit.
Did you notice that every "patriot" who says "we will defend our country" never goes on the front line ? The same with their children.
> We're all the same. Nothing has been shown more effective at tearing down prejudices than actual exposure and confrontation.
History is full of counter-examples.
> Nothing has been shown more effective at tearing down prejudices than actual exposure and confrontation.
The result has been fairly inconclusive. What happen is that people generally keep their views about in-groups and out-groups, but then add exception for the person they get exposed to. A good experience/friendship do not translate to a change in definitions for the in-group, nor does it change existing negative generalizations of the out-group.
What has shown to be effective is demonstration of shared values by the out-group, while at the same time avoiding display of different values. When people share the same values, and more importantly, do not display a difference in values, then the in-group can be expanded.
If I remember right, the book Behave by Robert Sapolsky goes through this.