FWIW, apology for failure doesn't suggest a lack of trying. I think that is the angle most are coming from. People are out there organizing and protesting, but it's just not enough.
It's kinda interesting from a German perspective because we also have the deeply engained reflex to signal remorse about our fascist dictator. I can relate to a degree because a lot of the phrases I hear do sound quite familiar. Ultimately it's not really the same of course. Not much we can do about Hitler at this point. Americans still have the chance to somewhat mitigate the spiral of generational shame.