The position "any compromise that ends the war is acceptable" is a nonsensical idea that gives agressors the ability to take any territory they want from weaker nations. Invade weaker nation, take some land, then force them to surrender to 'save lives'. Do you not see where this absolutist idea leads?

If the only thing that matters is saving lives, you can have whatever you want by taking lives. The end result is that people who are willing to kill for profit win.

If you don't want the world to be ruled by people willing to kill for profit, you have to take action to make that behavior unprofitable.