He, along with Friedrich Bernhard Marby, were imprisoned during the Third Reich for being unauthorised occultists.
Little is known of his life or of his fate in the wake of the events of the Nazi era.
Kummer, along with Friedrich Bernhard Marby, were criticized by name in a report made to Heinrich Himmler by his chief esoteric runologist Karl Maria Wiligut.
Goodrick-Clarke states that they were "censured by Wiligut in his capacity as Himmler's counsellor on magical and religious subjects for bringing the holy Aryan heritage into disrepute and riducule and this criticism may have led to Marby's harsh treatment in the Third Reich.
At least one report[4] has him fleeing Nazi Germany in exile to South America.