Look, we know that in any assassination scenario, whoever made it possible is also guilty. So the American Reichfuhrer's SS failed to keep him alive. Given the level of obsession and leader worship the majority have, and the level of defense around these otherwise worthless men sitting in a fancy office, one has to wonder HOW is it that such things came to pass, without someone calling it off, or someone slipping. Given the fanaticism I've met in the few American SS men I've known personally, I strongly doubt they "slipped" accidentally. So whoever headed that SS group that failed is guilty, likely most of its members are guilty, and whoever benefited is most assuredly guilty. The system, is, for sure, guilty, since it supremely benefitted by destroying one of its own agents.
However, one has to admit that the quality of the hit is marvelous, by any historic standard, PERFECTLY adhering to the Sun Tzu's "sacrifice of the unknowing agent to win the war."
The communists and fascists in power sacrificed JFK, Mr. Commie, to their cause, even after his "mr. stalin and I would be friends if it weren't for where we were born" lines, and by killing one of their own, they forever managed to throw a monkey wrench into everyone else's plans.
JFK was the unknowing agent, and his partners and masters were the winning side in the war against the people. And all they had to do was betray one of their own and arrange to get him killed.
If anyone still thinks it happened any other way, they'll spend the next thousand years chasing dangling threads, without realizing that the garment's already burned, so trimming the threads won't fix it anymore. We need to put on a new shirt. The old one's too far gone to be worth wearing.
That's just my take and why I seriously don't much care for the JFK thing.