I don't think he lied. I do believe he was lied to by the military. I am an historian, and I still rate LBJ among our top five greatest presidents. NOBODY but LBJ could have managed to get the legislation through Congress that he did. He knew how to twist arms and get cooperation better than any American president in history. We needed LBJ when he was president. No other man could have done what he did.
A lot of people think JFK was an important President. The only thing he did that was important beside get the top his skull blown off was his announcement that we would go to and return from the moon before a decade was up (The 1960's).
Again, the important thing to note was that LBJ got that program through Congress when nobody else would have managed. Easily one of the greatest true politicians in World History.
A historian who knows nothing about history.
Kennedy....Peace Corps, Nuclear Test Ban Treaty, sent in troops to support desegregation of schools in Miss. and Alabama, supported the integration of the military, stood up to the Russians during the Cuban Missile Crisis, got the Space Program going, the Alliance for Progress in Latin America, two Supreme Court appointments, gave a landmark speech in West Berlin, and gave one of the greatest political speeches in American history at his inauguration.
All this in less than 3 years....