Raging anti-semite, wanted to exterminate all the Jews, rode across Asia under a red banner with a white circle containing a swastika (in 1920!) -- where have w

Raging anti-semite, wanted to exterminate all the Jews, rode across Asia under a red banner with a white circle containing a swastika (in 1920!) -- where have we heard this before? He used to ride into villages and round up all the men. Those who were of an age to fight, he conscripted: the rest he put to the sword -- "they'll fight for us in their next incarnation". He was a proto-Nazi monster with genocidal ambitions.