Here are a few examples of irresponsibility.
The First action in any murder case is to look at the victim's enemies.
JFK had no foreign enemies.
On 11/22/63 one of Kennedy's emissaries was sitting in Havana with Castro.
Realizing how close we came to Nuclear War during the Missile Crisis, Kennedy had worked out a 1 on 1 communication with Khrushchev by installing the Hot-Line phone between both their desks. Khrushchev told Castro that Kennedy was a man you could talk to.
When Kennedy and Khrushchev realized that both of their Military Advisors brought them so close to Nuclear war they decided to work on Detente between themselves.
Here is a List of Kennedy's Domestic Adversaries;
JFK was going to Disband the CIA into a thousand pieces and scatter it to the winds because the CIA repeatedly Lies to the Presidents and Disobeyed Presidential Orders. As far back as the Eisenhower Administration that I can prove and, as recent as the Summer of 1963.
JFK was going to replace J. Edgar Hoover as Director of the FBI due to Hoover's Repeated Illegal activities against American citizens.
JFK Ordered the troops home from Vietnam one month before he was assassinated. That order was reversed by LBJ 4 days after the assassination. (See Vietnam button for both of those official records.
JFK stripped the Federal Reserve bank by issuing Presidential Executive Order 11110 on March 4, 1962.
JFK proposed eliminating the oil industry's "27 1/2 Oil Depletion Allowance.
JFK Requested that Corporate America give the American people a Fair Shake.