Not being ad hominem, but the degree of cognitive dissonance needed to equate the outright massacre of civilians, with evil not prevailing, is significant.

The internment of Japanese Americans cannot be justified by “end justify means” arguments. If those people were executed by the US, Your argument would still work.

Ethics and morals may be nuanced, but fortunately something that comes pretty easily to most humans. One must do done serious mental gymnastics to not listen to the heart. There are grey areas, but not so much in this massacre. There scariest realization for the world is that our death switch is at the hands of unstable humans. We, collectively, may already be more screwed than we perceive.