War is something that happens as the very last option to prevent chaos, I think. To preserve what's important. At least that is how it should be. Some stupid muggles people would rather squander the lives of others for petty reasons, I know.
But wars are still terrible, whether they're necessary or not. I'm sorry for what happened to you. Sometimes a baying mob just wants a target, and it doesn't care how much good you've done. I'll admit that I don't see the relevance to our situation, though. Ethical matters aside, if interrogators are sufficiently cruel most ordinary people will confess to anything at all, true or otherwise, and isn't that then worse than useless?