Let us lump some of the more common conspiracy theories together for a moment, and see what we have.  

The suspects are:

1.  The Mafia, for allowing Castro to take Cuba from them.  

2.  The Orangemen (see above) - I gotta admit, that's a new one on me.  Over here on this side of  the pond, the Catholic vs. Protestant thing is not as sensitive an issue as it seems to be in Great Britain & Ireland.

3.  The former USSR for making them lose face in the Cuban Missile Crisis. 

4.  LBJ.   No, I don't buy this one at all, but there IS a parody of Macbeth titled "MacBird" where LBJ plays the Macbeth part.  They had them in the book store when I was in college.  Guess who gets murdered?

5.  Jackie herself - for all the times he skipped out on her for sexual adventures which, if you believe the tabloids, was practically every night, with the secret service leading him through the sewers of Washington, headed for the lady who was connected with the mob, for a refreshing, ah how would we put this, co-educational exercise program.    Darn it!  Somebody should make a movie.

6.  Oswald.  Boring!  Let's go to the next one.

7.   Ultra-Right Wing Gun Freaks in Dallas - honestly, they're all armed, and they were all over the place.  Dan Rather, in his book, reported that after the shooting, local school children were cheering the event....  Terrifying, but not so boring.

8.  The American Polka Society, because he snubbed their invitation to attend a ho-down.  Do not laugh about this one, or you might receive an annymous phone call with someone playing Lawrence Welk music.  Buy ear plus!!

9.  And more.....