Great find!
So JFK admits he made a mistake.
In allowing Diem to be αssαssιnαtҽd, I doubt his understood his responsibility in the battle, between Babylon (Buddhism & тαℓмυdic Communism and Jerusalem (Catholicism).

Here's a link on this complex historical topic:
Evidence on the Diem Coup in South Vietnam, November 1963
Excerpt:
DISCUSSION
Vietnam perplexed American leaders from Franklin D. Roosevelt on. By the time John F. Kennedy was president, the situation seemed hopeful for a moment—long enough for JFK to think of Vietnam as a sort of laboratory where he could try out tactics and techniques. By this juncture, 1963, that optimism had evaporated and Kennedy felt that obstructionists in Saigon were losing ground against a communist insurgency. When, that May, Ngo Dinh Diem’s government got into a political confrontation with Vietnamese Buddhists, American frustration increased. So did South Vietnamese. A Central Intelligence Agency (CIA) operative was approached during the time of U.S. 4th of July festivities by South Vietnamese military officers who wanted U.S. support for a coup d’etat that might overthrow Diem (2003 E-book, docuмent 1).
This present E-book opens (Docuмent 1) with the record of a July 19, 1963, encounter between CIA Station Chief John Richardson and Diem’s brother, Ngo Dinh Nhu, who ran many of South Vietnam’s special services and was increasingly seen as the power behind the presidency. This shows that Nhu, even when “calm,” as Richardson observes, obsessed with Buddhists spreading propaganda and hiding communist agents among their monks at some of the most important pagodas. Nhu had begun weekly meetings with the generals of the Army of the Republic of Vietnam (ARVN) where he himself had introduced the subject of a coup—as he told the CIA, it was a “psychoanalytic” technique which might induce the ARVN officers to reveal their intentions.
Nhu continued his plotting, which eventually led to a plan to launch government raids against the most important Buddhist pagodas in Saigon and Hue (Docuмent 5).
Catholicism is ROME-- Not jerusalem...
