Philosophers have justified killing civilians in order to achieve a military objective.
You have yet to show a single philosopher who has justified in killing an unlimited number of civilians to achieve a military objective. All you have said is that it wouldn’t be allowed for that to happen. Which doesn’t mean it isn’t justified.
Can you even show a philosopher who agrees with your upper limit cap on civilian deaths you put up earlier? Don’t tell me to do the research myself, don’t give me the law, quote the philosopher specifically advocating your upper limit cap.
Or just admit you were being dishonest. Either one.