Practice War, What is it good for?

There have been many posts flying around about the nazi war reenactors, brought on by the idiot running in Ohio.
This is my take, which I posted as a comment at Balloon-Juice.

Study history. I can absolutely see that, there’s quite a bit to learn, if one tries. But reenact war? War is brutal, war is inhuman(not that we’ve let that stop us), war is not just death, it is also maiming and life altering for a very large percentage of the participants and spectators. War should be studied to see how not to have to do it, not to see how glorious it never, ever is. I do not understand how one learns this from reenacting battles without the bleeding. So what does one learn from reenacting?

How much fun wars are?
Wars are grave inhuman atrocities that sometimes have to be fought to keep them from being bigger and worse than they end up. Nothing more.