Depends on the war's goals and methods. Defensive wars and defensive behaviors are moral and just. Wars prosecuted with a chivalrous posture, especially toward non-combatants, are prosecuted justly. Usually, many such aspects intersect in a particular war, making the judgment complex, but it does not mean morality has no place in a war at all.
It's morning where I am, time to go to work. It's been fun, thanks.
I speak in a general way of the immorality of war and killing as I was referencing Biblical script before answering your post. I always address war from the point of an American who is grateful to have been spared in the decades of my life never having to have been in war and my admiration, respect and love of those who have served, including members of my own family who spilled their guts all over the globe in two world wars is SECOND TO NONE. I am fierce in defending what they did. And I am of the same mind to those who currently serve. I regret that I never served but I assure you I’m not trying to be some ‘’keyboard commando’’ here or a ‘’tough guy’’. Thus was my initial churlishness to you and I apologize. I don’t suffer fools and I won’t tolerate moral equivocation particularly as it applies to Americas military conduct in WW2.Ask me of Dresden and I’ll point to Auschwitz. I swore an oath to WW2 vets who have long left this world that when they were gone I would bear witness to what they told me. The truth of how they saved the world and gave us the greatest country on Earth. They wanted only to not be forgotten. No veteran dead or living ever wants their service to be forgotten. Have a nice day and thanks.