” I regret the loss of innocent life ...”
But then you defend it. Odd.
The end result of being unwilling to do whatever is necessary to win, is you become subjugated by whoever IS willing to do whatever it takes. A doctrine prohibiting injury of civilians results in the enemy using human shields and keeping their arms caches in school basements.
I choose not to be concerned with discussions of general morality. My objective is to achieve liberty for my family, friends, and our children, by whatever means necessary. I will advocate that the best path to victory is the one which minimizes loss of life WHILE STILL ACHIEVING VICTORY.
If the only way to have my own be safe from enslavement, is the total extermination of the other side, then I will not hesitate. The other side's leadership has the option of avoiding the deaths by leaving us alone, and thus I assign all responsibility for the necessary deaths to the aggressor.