I wouldn't say so. The CIA and high ranking military officials certainly hated him and wanted him dead. There was a strong motive and there many inconsistencies in the way the case was handled afterwards. The majority of higher ranking CIA officials really considered JFK a traitor, because he didn't send air support at the bay of pigs (following through with what he had clearly stated all along). There were claims that he had been subverted by the Soviets, was deliberately sabotaging the country, etc.
Personally, I remain agnostic but find it fairly credible that Oswald personally met a group of conspirators from the CIA a few days before the shooting and these people encouraged him to do what he did, maybe even made him some false promises about what would happen afterwards. It's also not unlikely that the killing of Oswald himself followed a similar pattern.
That's all speculation, but overall reasonable speculation, because of the existing motives. Many conspiracy theories are weak, because they fail to lay out a credible motive. JFK is not one of those cases.
But can a conspiracy of more than a very few people be kept under wraps for a lifetime? I find it hard to believe that if there really was a conspiracy that nothing concrete has emerged in all these years.
When everyone involved has been explicitly been trained and selected to work with secrets, in a historical period when such activities are extremely dangerous and brutal, and under the treath of expedite death penalty or assassination... it's not that hard to believe any involved party would keep very silent.
isn't that literally the job description for the cia?
for a more realistic view, see the interviews with LAPD people from the recent documentary on Bob Kenedy's assassination in LA.
it makes the case pretty clear, and show that people did talk. but that the good media, not wanting to promote conspiracy theories, silenced. The guy was pretty much boasting about his participation for decades and nobody cared.
I though the recent theory that Oswald did shoot at the motorcade but Kennedy was killed by accident caused by a Security service member being startled by one of Oswald shots and accidently discharging had a lot going for it.
While I'm entirely satisfied with the simple Oswald explanation, you are correct to emphasis how utterly terrible JFK's defense and foreign policy was.
The severe weakness shown in the Bay of Pigs debacle, an Eisenhower scheme he utterly wrecked by moving the location as well as the last minute denial of air support, directly lead to Khrushchev's nuclear missile adventure in Cuba. Which led to the closest the world has ever gotten to nuclear war, Soviet subs were under orders allowing them to use their nuclear torpedoes if damaged, and one captain decided this was a case but the decision required three officers, one of whom declined. (This ultimately resulted in Khrushchev getting sacked.)
There's lots more, but it's also worth mentioning that just a month before he was assassinated, he went along with his Best and Brightests' scheme to depose and inevitably assassinate the President of South Vietnam and his brother, which ruined that nation's officer corps and any trust they had in us, which led directly to our having to replace them with our own forces, and the nightmare that followed. LBJ's prosecution of the war was downright criminal, but at the highest level moral, he acknowledged the "you broke it, you own it" principle.
But one could see members of the Deep State deciding that JFK's assassination of an ally President made him fair game for assassination in turn. And for all they knew necessary to save the nation, he'd been reckless all his life, succeeding in starting WWIII given another 1-5 years was entirely possible.
Personally, I remain agnostic but find it fairly credible that Oswald personally met a group of conspirators from the CIA a few days before the shooting and these people encouraged him to do what he did, maybe even made him some false promises about what would happen afterwards. It's also not unlikely that the killing of Oswald himself followed a similar pattern.
That's all speculation, but overall reasonable speculation, because of the existing motives. Many conspiracy theories are weak, because they fail to lay out a credible motive. JFK is not one of those cases.