Completely true and completely irrelevant to whether it is right to go murder Iranian citizens. We don't live in a hunter gatherer society anymore. Your logic is the same that would be used to rationalize slavery.
If the people of a country deserve to die because of what their government does, have fun defending America's record.
I think there is a difference between being horrible and being insane and this may be one of those cases. I don't know if I agree with the verdict, but it may be the right one. One potentially good thing is that preventative detention will likely make it so he never released.