What is unethical is choosing to kill. Whether it is an unborn child, the folks down river from a factory, or a cheating spouse, it is the choice that is wrong. But if that choice has already been made, by attacking me or my country or something like that I will use lethal force if necessary to make sure it is the chooser who dies and not the innocent.Killing is ethical? So long as it is not you killed, right?
Tom