During my recent interview with former president, John F. Kennedy, who is in the light, he described how the Extraterrestrial Alliance can go back in time and alter events in key respects to prevent an unwanted outcome. Did they have to do this to carry out a successful assassination of him, followed by a successful cover-up?

This is a quite interesting new twist you are introducing here. The seed was planted within you by the juxtaposition of time travel in the context of the discussion at hand regarding his assassination. This was indeed a divine clue, and you picked up the trail and in your usual thoroughness have sniffed out the link here, and the ultimate answer for how a seemingly motley crew of sordid and hapless and limited and troubled individuals could ever be involved in a high-level undertaking with world-changing potential. This is the ultimate answer—that no matter how sloppy-looking it ends up to be, they are not taking risk because the entire experience can be redone through time-shifting until they get it right. The end result is a seeming set of coincidences that defy rational belief, but in fact can be very carefully planned and rehearsed and seen to with mind control manipulation of various players to be exactly at the right spot at the right time in ways that no one would believe could be preplanned and arranged, but in fact work. So without going into a play-by-play timeline account, which is not something we would choose to do, but leave to human ingenuity and scholarship, you can use this new perspective to go back and look at a number of the oddities and all that happened, and see where this could explain things with greater clarity, and allay some of the significant criticisms about the chaotic nature of that day and the subsequent events involved with the cover-up.