I can see similar racist attitudes today as those that pertained in pre-War Germany. People can still be anti-immigrants, anti-travellers,anti-blacks and so on. The circumstances may differ, but the mindsets appear to be the same. Some folk would be thrilled if it were suggested we round up all immigrants and transport them off to 'camps'.
It makes me very sad that 'lessons have NOT been learned'. Since the Holocaust we've had Rwanda, Cambodia and no end of other genocides.

I knew a Deaconess in Scotland who had been in the Red Cross and among those who liberated Auschwitz. She never spoke much about what she saw, but said only that she had seen Hell with her own eyes. She noted that one could smell the camp about twenty miles away when approaching it.

Just after the War, cinemas didn't hesitate to show the mounds of corpses and skeletal 'survivors' on their Newsreels. I was very shocked as a child to see these things.
I always light a candle and put it in front of our door on Holocaust Remembrance Night. A tiny gesture in honour of all those millions and millions of sufferers and deaths.