Yes Gypsies were amongst the groups the Nazis were determined to kill off. The main groups they wanted to exterminate were Jews, Jehovah's Witnesses, Gypsies, the mentally and physically disabled, German Communists, and homosexuals, as well as those who opposed the Nazis. You could be sent to a concentration camp for hiding or aiding Jews or allied airmen who had been shot down. Not every German supported the Nazis and some actually assisted allied men escape from Germany. Even being a German who was found to be listening to the BBC radio broadcast from Britain could have you sent to a concentration camp.