This week was the 75th anniversary of the liberation of Auschwitz, and I kept thinking back to my visit there years ago. It was haunting in ways I couldn’t have anticipated and that I haven’t been able to shake in the nearly two decades since.The entrance is famous. The railroad tracks, too, especially for anyone who has seen “Schindler’s List.” The familiarity of a place one has never been before is a punch in the stomach. I didn’t want it to feel familiar.I visited on a gorgeous spring day. Some friends and I made a weekend excursion to Krakow and, being serious intellectuals interested in history and culture, included a trip to Auschwitz. The train took us through the lush, rolling hills of the Polish countryside. As we walked the grounds, butterflies danced through the air and birds sang. I have read that when the camps were packed with people, there wasn’t so much as a blade of grass, much less wildflowers bobbing in the breeze. Did people hear the birds sing beyond the barbed wire? The movies seem to always be set in winter, almost black and white even when shot in color. But what of those balmy days when the wind carries the syrupy perfume of freshly cut grass? What a cruel juxtaposition, to see the stars above at night or feel the spring breeze or hear a bird sing and to know the universe is brimming with beauty, and yet they are trapped in a living hell. A living nightmare.Unfortunately, in the 75 years since the end of Auschwitz, genocide has not ended. It is always a delicate subject to bring up other cases, or other mistreatments. The point is not to compare; each case is monstrous for those who suffered. But if we think genocide is wrong, then it is wrong no matter who the target is, and we should push back against creeping “otherization” that strips people of their humanity, that treats them as a block to be expelled without exceptions. Because one cruelty leads to another. History might not repeat itself but it rhymes.The National Public Radio show “Fresh Air” ran an interview with Laurence Rees, author of the book “Auschwitz: A New History.” You can listen or read the transcript here. National Public Radio delivers uniformly excellent reporting. Support them if you can. Journalism–the real thing, with reporters who dig for facts–is what keeps us free.That top photo is one that haunts me most. It’s in the bathroom–it shows the long trough sink, and the squares are soap holders, with ridges so the soap doesn’t sit in water and melt. It sums up the insanity of Auschwitz: a place where soap was valued but human life wasn’t.I am not in a position of authority here. I am not Jewish and didn’t know about the Holocaust until high school when I read Anne Frank. On the other hand, the whole point is the universality of our humanity. Everybody should care. We all must remember.