See how that works? "Horrible," "thoughtful," "reasonable"--as defined by you. Might-makes-right and the-ends-justify-the-means. Astounding hubris and a stubborn refusal to learn from history. And an apparent inability to reason from abstract principles.
This is why national borders (and federalism within national borders) are good: compartmentalization prevents damage from spreading. Without bulkheads, flooding easily sinks the whole ship.