Ethical argument supporting the violation of someone's civil rights without due process?:
I can't find ANY good ethical arguments. You mean good unethical ones to rationalize his actions. Didn't Hitler think the same way. For the good of the many means violating the US Constitution. And it really isn't fiction is it? You just need some ammunition. Well  you won't get it here!

And there was nothing ethical about nuking Japan. Truman was led to believe they were military targets, when in fact most were women and children. There wasn't a military target in sight! And we didn't have to nuke 2 cities!