If you become "morally" the same as the original aggressor, what exactly are you defending?
War is bad, evil. Yet of course we can't allow unchecked aggression. Solutions are not simple as Balkans, Georgia, Crimea, Ukraine etc since WWII show.
East Germany 1948
Hungary 1956
Czechoslovakia 1968
Afghanistan: Russians and then West. It's not solved.
Second Iraq War:
The so called "Arab Spring" or "Social Media Revolutions" in Arab / Moslem world nothing of the sort. Libya is a mess. Egypt is worse than Mubarak era. Palestinians go from self inflicted disaster to disaster. 1Million Syrian Refuges in Lebanon. I bet none in 10 years after the conflict ends, vs the deliberate policy of Arab world to keep the Palestinians as refugees.
No solution for Iran's Nuke program.
No solution for N. Korea's Nuke program.
No solution for IS / ISIS
Saudi Arabia and Gulf states.
All the Yemen wars pointless.
French and USA Indochina/Vietnam pointless.
It's easy for the winners of a war to say the other guys were really bad. All the bad stuff we did was so totally justified, because <insert unproven winners rationalisation>
Winners write history and decide who gets tried for war crimes.
I don't have the answers, but sophist justifications of the winner's atrocities (especially when the war was justified!) gives politicians the confidence to fight new pointless ones and commit war crimes in wars that are needed.
http://en.wikipedia.org/wiki/Universal_Soldier_(song)
Donovan's version of Buffy Sainte-Marie's song:
He's five foot two and he's six feet four
He fights with missiles and with spears
He's all of thirty-one and he's only seventeen
Been a soldier for a thousand years
He's a Catholic, a Hindu, an Atheist, a Jain
A Buddhist and a Baptist and a Jew
And he knows he shouldn't kill and he knows he always will
Kill you for me my friend and me for you
And he's fighting for Canada
He's fighting for France, he's fighting for the U.S.A.
And he's fighting for the Russians
And he's fighting for Japan
And he thinks we'll put an end to war this way
And he's fighting for Democracy, he's fighting for the Reds
He says "It's for the peace of all"
He's the one who must decide, who's to live and who's to die
And he never sees the writing on the wall
But without him
How would Hitler have condemned him at Labau?
Without him Caesar would have stood alone
He's the one who gives his body as a weapon of the war
And without him all this killing can't go on
He's the Universal Soldier and he really is to blame
His orders come from far away no more
They come from here and there and you and me
And brothers can't you see
This is not the way we put the end to war