Hey Boris
I have struggled with similar questions all of my life. . . so much so that my life has brought me into direct and personal contact with the military community in my country on a regular basis.
The world which I born into does not match the vision or 'memory' of the world which I was born believing in...
Alot of people in the military have a strong sense of purpose and believe that what they do is contributing to peace in the world. I have personally come to the conclusion that these people have chosen to have these experiences for the evolution of there soul.
I am in no way a supporter of war, it saddens and me immensely and damages us all... but in getting to know soldiers on a personal level, it has helped me to understand them on a human level without the judgment.