Two groups were: trade unionists and Jehovah's Witnesses.
Yes, some Roma people, often referred to as Gypsies, did survive World War 2. However, they were one of the groups targeted by the Nazis for persecution and many were killed in the Holocaust. The exact number of survivors is difficult to determine, but there are Roma communities around the world today.
It did not transform into genocide. Genocide was the ultimate goal from the time the Nazis came to power.
In the context of World War 2 resistance groups resisted the Nazis.
The resistance groups used sabotage, strikes, demonstrations and assassination to try and over ride the nazis. If caught doing this they were harshly treated by the nazis.
It was an organized mass extermination of groups of people considered "undesirable" by Nazi Germany. Groups targeted included Jews, Catholics, gypsies, homosexuals, artists, academics, and anyone else the Nazis felt like eliminating.
During World War 2, they targeted the people of the Jewish religion.
Jewish Groups
All who opposed the Nazis and their allies.
Jews, Russians, Chinese, Poles
the allies.aka usa russia France and the UK
Gypsies were the only other group subject to the same persecution and dictates.
During World War 2, many Gypsies were forced to wear uniforms and identification badges in concentration camps to distinguish them from other prisoners. They faced persecution and discrimination by the Nazis for their ethnicity.