 His brother Prince Philipp joined Hitler's SA.They were certainly not the only family members to embrace Nazism; their mother "Mossy" (a sister of Kaiser Wilhelm II) invited Adolf Hitler to tea and flew the swastika from her home at Schloss Kronberg.The historian Hugo Vickers claims that Prince Christoph was "disenchanted" with the Nazi Party by the time of the assassination of Reinhard Heydrich in 1942.