Just a FYI those aren't just jewish nazi victims there. They have the "purple triangle " as the patch, which were only given to Jehovah's Witnesses of any national background who were living in Germany. Some of them were Jewish, some were German, some were Polish.
Those are concentration camp badges to help the guards assign task to detainees. They were color coded and regarded as badges of shame. You can't tell the color by the photograph as its in black and white but purple was jehova witnesses. https://en.m.wikipedia.org/wiki/Nazi_concentration_camp_badge
Sometimes I think posts like this don't get as much likes as a political opinion