I’ve always believed this because as soon as any candidate became president, all thoughts of warming relations with them were discarded...why? They were involved with the Mob in killing Kennedy.
This may have been what Obama was looking so "white" about on the third day of his intelligence briefing ~ that his buddy Castro had already bagged one President, and MLK.
No doubt it gave him a "naked feeling", particularly when the FBI/CIA crowd let him know that his own Mob backers, the guys who own the government in Chicago (Daley, Bobby Rush, Jesse Jackson Jr, Blogojevich, Rahm Emanuel, Jarrette, Gibb, Durbin, etc.), did the job for their own reasons, and with Castro.
Sounds to me like it's a time for close, upfront and personal diplomacy by the President, with NO preconditions. Just hop a plane and fly to Havana.
Hey, he might as well. One of his closest advisors is Greg Craig, right there in the White House, and any time Castro wants he can shout "pull" and those guys are going to take Obama out so fast the Secret Service will still be pulling their pants on before they get there.