What idea for isolating the Jews, borrowed from the USA, was proposed but rejected by the Nazis?

What plans did Reinhard Heydrich propose in his “Problem of the Jews in Occupied Areas”?

Birkenau

What special types of experiments did Dr. Carl Clauberg carry out and where?

Carl Clauberg

Dr. Josef Mengele

Beginning with the rise of Christianity in ancient times, Jews living in the West began to confront new challenges. What were the roots of those challenges? How did Jews respond to the problems they faced? Please provide an overview from ancient times to the 20th century.

Operation Barbarossa

Describe the types of experiments carried out by Joseph Mengele.

Zyklon-B