There is no such thing as "that is none of our concern" any longer. The world is too small for that sort of small minded attitude. We cannot turn our backs on atrocities just because they don't occur here, or else they will wind up coming here. That is what your boys are fighting for. God bless them.
I do understand your concern for your boys, as I have gone through the same concerns. Still, whether we believe in the cause or not, we need to support those of our loved ones who are defending that cause with their very lives.