Keep in mind, too, that International Jewry (that's what they called themselves) declared WAR on Germany in 1933. That made the Jews in Germany "enemy combatants."
Not all Jews were sent to prisons. Some were in the German army. But the ones who were sent to prisons were suspected of being enemy combatants, generally in the form of communist infiltrators attempting to overthrow Germany.
Keep in mind, too, that International Jewry (that's what they called themselves) declared WAR on Germany in 1933. That made the Jews in Germany "enemy combatants."
Not all Jews were sent to prisons. Some were in the German army. But the ones who were sent to prisons were suspected of being enemy combatants, generally in the form of communist infiltrators attempting to overthrow Germany.