Marian Turski, Auschwitz survivor and Polish historian, made a ten minute speech in December 2021 that has become a more and more timely reminder to pay attention to how we think about harm to one another.
He explains the slow and slippery way a government can get us to accept evil in society. Here it is in full, and it just takes four minutes to read, but I've bolded some important bits:
Let's use our imagination and our thoughts to get to the early 1930s, to Berlin. We find ourselves in the Bavarian district. It's just three stops away from the tier garden, the zoo. There is a station of the metro there; there is park. And one day in those early 1930s, you can read an inscription on the benches: Jews must not sit on these benches. You could say it's unpleasant; it's not fair; it's not right, but after all there are so many benches around you can sit somewhere else. Of course you can.
That district was inhabited by intellectuals, by the intelligentsia German of Jewish origin. Albert Einstein used to live there, Nelly Sachs the Nobel Prize winner, the politician and industrialist who was minister of foreign affairs. There was a swimming pool and over its door an inscription that read: Jews are forbidden to enter. You could say but there are so many places in Berlin where you can take a bath or swim, so many lakes, canals. It's nearly like Venice. At the same time, you can read somewhere else: Jews must not belong to German singing associations. So what. All right, they want to sing. They want to make music; let them just meet somewhere else. They will do their singing. all right.
What comes up later is an order, really, more of an order than of an inscription: Non-Aryan children must not play with Aryan children, with the German children. All right they'll play on their own. And then you read, we only sell bread and food to Jews after 5 p.m. Right. Less choice: this makes your life harder, but after all after 5 p.m you can still do your shopping. Now I warn you, I warn you, I'm getting used to that thought that someone may be excluded becomes mediated into our lives, the thought that somebody can be stigmatized, that someone may be alienated.
And that's how it is done: step by step, slowly.