Den Beste
For a bit of fun I headed off to Stephen Den Beste's USS Cluelesss (if you remember he's the man who likes to make photoshopped jokes about September 11th) to see what the prolix one had to say.He sure isn't keen on North Koreans who it appears are going to be nuked if America gets nuked by anyone.
"We'd also have to establish a new doctrine, and this would be more controversial and politically risky. The doctrine would be that if anyone set off a nuke in our territory and no one claimed responsibility, or if a terrorist group claimed responsibility, in that case we'd also obliterate NK"
ps John B in the comments section points out that I am being unfair to Den Beste here and he is right. He does specifically say this would not be a good idea, albeit it because NK would have a bomb, not because of the lack of evidence. Furthermore in Den Beste's defence when one of his correspondents suggests if someone nukes the US ANYWHERE in the world that can't prove it wasn't them should be nuked, or another suggests that North Korea should just be nuked anyway before it drops a bomb on the US, he does patiently explain why this might not be a good idea.