Final answer:
The non-Jewish group mistreated during the Holocaust were the Roma peoples
Step-by-step explanation:
The Nazis mistreated several non-Jewish groups during the Holocaust, including the Roma peoples or Romani people. The Roma, also known as Gypsies, were targeted by the Nazis due to their ethnicity and perceived as racially inferior. They were subjected to forced labor, sterilization experiments, and mass killings.
It is important to note that the mistreatment of the Roma was not the same in scale or scope as the atrocities committed against Jews during the Holocaust, but it is an important part of understanding the full impact of Nazi persecution.
Learn more about Holocaust and mistreatment of non-Jewish groups