In short: everybody was cheering, all of the hundreds of thousands of real, live, anguished Berliners were deeply touched and overjoyed to have President Kennedy showing solidarity with them. And not because of some sort of imaginary linguistic blunder. I know this. Because, see, I've met people who were there, listening to the speech. And when you tell them about the pancake story, they'll just look at you blankly.
Oh Jerry, I know that. Everyone knows that. JFK didn’t even speak German. He’s obviously not to blame.
All I am saying is he had a lousy translator who could have and should have expressed this sentiment differently. He could have easily avoided the later jokes.