The Russians did it. Fidel Castro did it. The U.S. national-security establishment did it. The Mafia did it. A lone nut named Lee Harvey Oswald did it.
The reaction among some people was predictable: "Oh, there are so many JFK assassination theories that I guess we'll never know what really happened." Or "It's all so overwhelming and I just don't want to be pulled into the rabbit hole."
Actually, however, understanding the various conspiracy and non-conspiracy theories in the JFK assassination is really not that difficult. All it takes is some critical thinking, analysis, and common sense.
There are three major conspiracy theories and one non-conspiracy theory (i.e., the lone-nut theory). Let's examine each one. I believe you'll see why the matter isn't as difficult as mainstream writers and commentators make it out to be.