In (West-) Germany, his image is the one of the young and smart President, a man of action, encouraging people. Until today almost everyone knows his sentence „I am proud to say: Ich bin ein Berliner“. And as you can see on the stamp, he stands for the Apollo program.
On the other hand, there is the Vietnam war – no one here links it to JFK. So, the card is not to proclaim any „truth“ but wants to focus on this aspect of the Janus-like JFK.