Quoting The Hoaxers, page 622:

The Washington Star, June 26, 1963, carried an Associated Press dispatch from Berlin relating an incident of President Kennedy’s visit:

Facing him [the President] from the Communist side of the wall was an East German sign which said:
“In the agreement at Potsdam, United States Presidents Roosevelt and Truman undertook:
To uproot German Militarism and Nazism.
To arrest war criminals and bring them to judgment.
To prevent rebirth of German Militarism.
To ban all Militarist and Nazi propaganda.
To ensure that Germany never again menaces her neighbors and world peace.
These pledges have been fulfilled in the (East) German Democratic Republic. When will these pledges be fulfilled in West Germany and West Berlin, Mr. Kennedy?”

Mr. Kennedy read the sign but showed no reaction.

(Emphasis added. Somebody once suggested to me that there was simply ‘a distinct lack of understanding about semiotics going on’, but I’ll let you decide whether that’s probable or not.)

Perhaps only tangentially related, but as the young Kennedy was touring in Europe, he claimed that ‘Fascism seems to treat [the Italians] well.’ (He did complain about the arrogance that many in the German Reich exhibited, and he made fun of their salute, but nothing substantial.) Later on, he would also endorse the so‐called Assembly of Captive European Nations, an organization staffed by Axis collaborators, and while he may have indeed temporarily sympathized with the Republican side in the Spanish Civil War, in the end his régime would only continue the U.S. policy of supporting the anticommunist dictatorship anyway, who mourned his murder in late 1963. Make of that what you will.