So it's 1933, and you're a secular Jew in Berlin. You have a wife and two school aged children. Life is not too bad, I mean, there's a real scary guy in office but you know, we've had crazy antisemites around before, Germany is progressive. Everything would be fine. Several months go by and things still seem okay. Then a few of your son's friends are beat up in the street. Then your son comes home with a black eye and a bloody nose. Then he comes home with a broken rib. He asks to transfer to a Jewish school because his peers and teachers are constantly harassing him. With some sadness, you agree, taking both your children out of school and paying for them to go to Jewish schools. Now it's 1934 and you hear from a friend that without warning he has been fired from his government job. You start to hear from friends and neighbors that they are making plans to emigrate to Palestine, others are thinking of moving to France, still others hope for passes to America. You dismiss this as an over reaction. You hear about Hitler's purging of the SA and think his time must be limited because no one will support him after this. But they do. A few months go by and it's 1935. A new set of laws is established and suddenly you are no longer a German citizen. Your papers now hold a large red J and the middle name "Israel" has been added to all your documents. More friends leave. But you don't know anyone in Palestine, or in America. And besides, you're a veteran. You fought in the Great War. Certainly nothing can be done to you.

It is 1937, and now you have lost your job. You and your wife decide to move the family to a smaller apartment in a more Jewish neighborhood.

It's 1938 and your synagogue is burning. You are arrested and sent to Dachau. Luckily you still have money and within a week your ransom has been paid, and you return home.

It is 1939. And Hitler has invaded Poland. You fear for your children.

It is 1941. Hitler has sent troops into the Soviet Union. You barely have enough money to pay rent. Your wife and children are growing thinner. One morning you receive notice that you are going to be deported to the east. You don't know what that means. But you have heard rumors...

You get on a train early in the morning. There are two buckets. One for water, one for waste. There is too much waste, and not enough water. Four days later you arrive in Warsaw. Oh how the city has changed since you visited in 1923. Your family moves into an apartment which already holds six people. And two screaming babies. Their stomachs swell with hunger. They will not survive long. Your family begins to starve. The two babies stop crying. One day they are gone. There is not enough food. Every day there are bodies in the street. Shot and starved. Months go by. It is 1942, and now every day there are deportations. Then you are on another train. There is another bucket.

The box car opens, and the sun nearly blinds you. This place has an overwhelming smell of death. You look to your right and see a sign reading "Treblinka." You are told to leave your luggage at the station. It will be given to you later. You know it will not. It is exactly what that madman in the ghetto described. You kiss your wife and daughter, and pat your son's back and start the walk down a long, dark tunnel. Your daughter is dragged away, and you watch an emaciated man chop off her blonde braids. A child is crying. A shot rings out and there is no more crying. You can't find your wife in the crowd. You hold onto your son's elbow to keep him close. You come to another prisoner and he tells you to give up any valuables. You take a few coins from your pocket and hand over your bag which holds everything you have left. The man tells you to give him your wedding ring. With shaking hands you oblige. A few more steps and now a prisoner is shaving your hair, your son's hair. You remember how he was born with soft brown curls. You remember how beautiful your wife looked, sitting in bed in a blue nightgown, holding your little baby. You hold your son close. He has grown so weak, sometime in the boxcar he began to run a fever. He's taller than you now, but he lays his head on your shoulder, letting you help him walk. You go through a large wooden gate and that smell gets worse. In front of you there is a large stone building, it looks like a bath house. Your wife and daughter have found you again and your daughter hugs you tightly. You barely recognize them with their hair shorn, but your wife is still so beautiful. You stroke your daughter's head and see blood, the clippers have cut her scalp deeply. Someone shouts at you and drags your wife and daughter away to the group of women, you call to them, but stop when the guard begins beating your wife. Someone barks at you to undress and you feel sick, averting your eyes from your wife and daughter as they begin to remove their clothes. Your daughter is crying. She is 13. Your son is swaying and he can't seem to undo the buttons of his jacket because his hands are shaking. You murmur soft words of kindness as you help him undress. He vomits, but there is nothing to be done. He is 18, he will not get any older. A guard comes up and hits him in the back. Again, and again. He collapses, half conscious. You pull him up, he will be shot if he can't stand. He can't stand. But you manage to hold him. You tell him you love him. You are herded with dozens of other men into a dark room. It all takes about twenty minutes.

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https://encyclopedia.ushmm.org/content/en/article/german-jews-during-the-holocaust

https://encyclopedia.ushmm.org/content/en/article/german-jewish-refugees-1933-1939

Saul Friedlander's "Nazi Germany and the Jews" and "Years of Extermination"

Much of course can be said, but... it was pretty bad.