The Nazi Camp Guard Case that Explains the Trump Travel Restrictions The Nazi Camp Guard Case that Explains the Trump Travel Restrictions They weren't a 'Muslim ban', but a way to differentiate between the oppressor and the oppressed On February 20, DOJ reported that Friedrich Berger, a German citizen and erstwhile resident of Tennessee, had been removed to his homeland for his participation in Nazi-sponsored persecution during his service as a guard at a concentration camp near Hamburg in 1945. That case illustrates the logic behind the Trump administration's travel restrictions for certain aliens from 13 countries, which have been erroneously derided as a "Muslim ban".