Massive artillery barrage on Seoul, funneled troops including SOF push south, potential nuclear ICBM launches on Seoul, Tokyo, Pusan, US west coast. We know where they have some toys but not all of the chest, let me put it that way. 30 to 40,000 KIA within the first two hours. Guaranteed NK retaliation via the methods above and maybe chem/bio launches, insurgency. Bad stuff Higgins but the US and SK would win it in the end.
I think we should lance the boil before the infection gets any worse. The U.S. shouldn't be afraid to do whatever it takes. Conventional bombs. Have some agents infiltrate NK military establishments and knock out key personnel with chemical weapons. Prior to doing all this, rapidly withdraw all US and SK personnel from border/DMZ zone. The first strike should be at all nuclear sites in NK at once, to ensure they can't launch anything at Seoul.
Also, work with China to ensure they have NK's northern borders lined with mines (this planting of such can occur months ahead of the actual assault)
There are 1.8 million Korean Americans, and over 12 million Asian Americans. I suspect the CIA or military could find some people who would blend in. And that's assuming he wasn't talking about a Osama-takeout-style strike by special ops.
I still think it would be a terrible idea unlikely to succeed or have the intended effect.
Even if this fantasy that infiltrating North Korean military establishments with American agents was realistic, it is rather racist to assume that just because "they all look the same" to us, we could just plop even an ethnic Korean American (let alone an ethnic North Korean) and just expect them to pass as a local, even with training. If you have lived in these countries, you know that they can spot a foreigner from a mile away before they even open their mouths, regardless of their appearance. Literally every aspect of their behavior is different from ours. Ironically, North Korea's technological backwardness provides some degree of protection against covert attacks.
The only realistic method of North Korea infiltration would be to have Americans pose as a European students for basic espionage only, since foreign students are basically left alone to live free in North Korea ("you all look the same" is a two-way street). Foreign businessmen would get more access, but much more scrutiny. Student and academic/cultural exchange visas are classic routes for spies to enter target countries.
