Posted today over at Instapundit, a new book claims the KGB was in on the Kennedy assassination, by steering Oswald. As conspiracy theories go, this one was always a bit better than most, because as Reynolds points out, the KGB actually did do this sort of thing. I would add that this particular conspiracy only requires a few people to be in the know, which is where most of the others become entirely implausible. ("You think that hundreds of people involved in the building of the World Trade Center years ago...")
It still remains implausible, but it did put me in mind of something else on the topic. Ion Mihai Pacepa, former head of the Romanian secret police and highest-ranking defector of the Cold War, has long claimed that the KGB claimed the deed was theirs. Just because they claimed it doesn't make it so - groups looking for status and intimidation might very well claim credit without it being remotely true. ("Kennedy assassination? Yeah, that was totally us. We did that.") Pacepa found the claim credible, in much the same way as described here: that it was a side operation that sort of fell into their laps when this crazy American showed up and looked willing. This wasn't a master plan, but opportunism. In that context, I suppose it could be so.
Here's an important takeaway that keeps getting left out of the popular record though, but is quite clear here. Lee Harvey Oswald was not some odd, politically unclassifiable aberration. He was a man of the left. The obfuscation of this comes from emotive, rather than logical places - but gee, he was a Marine, and...he had guns...and it was in Texas... those are all conservative things and therefore a mixed picture. Breaking those down one by one, they're pretty weak.