"Its also a little too convenient that a country which outright bans american films and that would never have to tolerate its citizenry watching it, happens to care enough to make a retaliatory strike against what for all intents and purposes is a nonthreat."
Apparently dodgy Chinese DVD copies regularly make their way into North Korea, and a number of Hollywood Films are quite popular regardless of their actual legality so I think you're wrong about that. See this story going back to 2012 for example:
http://www.bbc.co.uk/news/worl...
This page explains how it happens quite well:
http://www.libertyinnorthkorea...
Frankly I'm getting a little tired of the "security experts" who decry the claim that it's North Korea because all they seem to be doing is saying "No it wasn't" without providing any counter evidence and simultaneously contradicting each other. We've got some telling us GOP didn't claim to be doing it over the Interview until a little while after the leak as if it was just taking advantage of that as misdirection, and now it turns out some North Korea IPs were involved we're being told that that's not evidence because anyone could hack North Korean IPs. Which is it? was it planned to be pinned on North Korea or not? The "security experts" need to start providing a bit more meat to their counter claims rather than just putting out a whole bunch of contradictory and sometimes outright nonsensical speculation. They're all coming up with different stories, none of which has any evidence, and all of which stop making sense at various points (generally ranging from lack of motive through to inconsistency of argument).
I agree the information released by the US to date is a little poor but I don't see it as particularly out of the ordinary. Maybe the FBI don't want to give away their methods, maybe it was a trivial hack and Sony doesn't want to be embarassed. Maybe it was an advanced hack and the FBI is worried about others figuring it out. Maybe they just don't care enough about internet conspiracy theorists to really give a shit that they even need to.
But I prefer to go by what the people involved have said. First we have the North Korean regime bitching about the film, then the hack happens, when asked if they did it North Korea says "Wait and see", then GOP comes along and takes credit, and then seeing the flack they got North Korea denies it, then when Sony finally cancels the release and as a result the US government gets involved and starts counter-striking North Korea suddenly GOP goes all quiet.
Given that North Korea is the only place that gives two shits about the film, I don't see it as being a particularly far fetched scenario that North Korea actually did it, realised in the face of non-stop media reports creating a Streisand effect it had maybe gone a little far and made the problem worse and so washed it's hands of it. Maybe they didn't even do it themselves, maybe they paid someone. Maybe you're right, maybe they didn't do it at all, but right now no one's providing any evidence and I don't frankly see any reason to disbelieve the North Korean theory, they're the only ones with any real motive and there's nothing to make the story unbelievable. If you don't think North Korea would care about a film like this then you're wholly naive about how important to the North Korean leadership maintaining Kim's image as a magical deity is.
The fact the US authorities have lied so many times about so many things doesn't mean we should instantly disbelieve everything they say. God only knows if we're going on who to trust based on lies told then I've no idea why you'd favour North Korea's very delayed claim of innocence - this is the country that's claimed it's leader has cured AIDs and found unicorns or whatever the fuck they've come up with lately. As lies go North Korea's have always been more blatant, more obvious, and often more fantastical than anything the US has told. Why believe that's changed now?