the same in the circumstances. He doesn't appear to have been a true believer, however, and his expression in the photo has been characterised as "Meh". It doesn't really look like a courageous stand against the iniquities of the regime, but going against the flow is really important, somebody has to do it. One of the unconsidered certainties of the time and place was that The Party was not only running the trains on time, it was fundamentally A Good Thing. Landmesser was a little skeptical and this photo is the evidence that he was skeptical at the time rather than by re-writing his personal history after the war. He fell in love with the small woman in the bathing cozzi, Irma Eckler, and they were engaged but couldn't get married because she was Jewish and he wasn't and the Nuremberg Laws (Das Gesetz zum Schutz des deutschen Blutes und der deutschen Ehre) forbade such marriages. Interestingly, she was a Sephardic Jew whose family had come to Hamburg from Spain via The Netherlands: most German Jews were Ashkenazim. Things went pear-shaped for these ordinary citizens thereafter. The parents were arrested, imprisoned, released, sent to a death camp, sent to a penal labour battalion and disappeared during the war along with millions of others across Europe. The daughters were separated but, like Jakow Trachtenberg, through a succession of lucky breaks survived. When the famous photograph of the man who didn't salute was re-churned by the German press long after the war, one of the daughters recognised him as her father and the dates-and-locates seemed to fit. You can fill out the story and see a better picture. Or get a much more detailed and data-rich story.
Landmesser was not a hero in the obvious sense of the word, just a man trying to make the best of difficult circumstances beyond his control without compromising his integrity too much. His birthday is 24th May 1910. We have a name to trigger the removal of hats and a time to do it. Make note in diary!