I’ve concluded that Germans were taught “never again” as a very specific “Germans” vs “Jews” thing rather than the Humanist “never again shall people be murder en masse because of their etnicity” that does not include any specifics about the etnicity or credo of the perpetrators or the victims.
Certainly, that would be very consistent with not just the current behaviour of German politicians when it comes to Israel’s Genocide but also how the past events which Germans regret are invariably framed and talked about in race terms, i.e. “Germans” and “Jews”, even to the point of excluding other etnicities that the Germans also targetted and murdered in large numbers during WWII such as the Roma.
If one doesn’t destroy the racist framework of thinking of people as members of a race first, one is still a racist (even if some races one before though of as “lesser”, one now thinks of as “like us”), because one is still running around judging and acting based on prejudices about entire races and credos when dealing with human beings - not treating them as persons but rather treating them as members of groups they were born into.