Final answer:
Humor, when used as part of Nazi propaganda to normalize anti-Semitic stereotypes and dehumanize Jewish people, was indeed harmful during the Holocaust era and contributed to the extermination of over 6 million Jews.
Step-by-step explanation:
To answer the question regarding whether humor was very harmful during the Holocaust era as either true or false, we must consider the context of the question. If the statement pertains to the use of humor by the Nazis as part of their propaganda and dehumanization methods, then in that sense, humor was indeed a harmful tool that contributed to the widespread acceptance and normalization of anti-Semitic views. It was part of a larger strategy that included the demonization of minorities, especially Jewish people, and the gradual stripping away of their rights, leading to the Holocaust. This tragically resulted in the extermination of over 6 million Jews during World War II.