That's what I thought until I read Gerald Posner's excellent and highly regarded Case Closed a few months ago. It'll change your mind. Oswald did it because he was a communist fruitloop. The conspiracy theories were put forward by leftists, especially early on. It's easy to see why: they didn't want a communist to get the blame.
Oswald may have been a ‘fruitloop,’ but the conspiracy is far beyond theory, and no leftist had anything to do with it. The assasination was due to the very same tyranny that has dogged the common man for a millenium, and it poked it’s head up again last week. It’s time to get your head out from under the bed and act on the facts while you can. Wait too long and it’ll be all hindsight.