you realize that in the event of a concerted nuclear attack that multiple decoys will be fired to waste the defense system's ammunition and time, right? missile defense systems are not foolproof and the added uncertainty as to which incoming missiles are live warheads further reduces their efficacy
because those people propped up a militant regime for so long that it not only produced a fully developed nuclear program but developed the necessary infrastructure to successfully conduct a nuclear strike on another world power, and a complete failure to respond in any immediate way only enables this regime to continue to produce and deploy nuclear weapons. this emboldens other regimes with nuclear aspirations and tells them there will be no immediate fatal consequences for their own deployment of nuclear weapons
a conventional invasion of north korea would take months at best. they have 13 million available for military service that can conduct a guerrilla campaign for years while the government goes into hiding.
correct me if im wrong but considering north korea is stuck a communist state (along with its physical size), it's considerably less sophisticated than us, a global power with access to every sort of arms and the diplomatic power to call aid from powerful allies (for the time being). missile defense systems aren't foulproof, but they are damn good against something as relatively minimal as korea
granted in the event of an unprovoked attack from nk, we'd need to act fast against them, a diplomatic invasion first would probably be necessary--hell even performing a coup would be great if we were ever given permission from the UN to do so
what about the vietnam war and the korean war then? if the convention was still enforced at those times why did the USA go to war anyway?
world history has taught me about the wars but they didn't tell me about the geneva convention being involved....i really really wonder.
containing communism was considered a larger issue than you'd think
along with that, south korea and vietnam were invaded first, we got motive to go to war so we were given permission