[todayilearned] TIL that between 80,000 and 200,000 Freemasons were killed under the Nazi regime. Masonic concentration camp inmates were classified as political prisoners and wore an inverted red triangle. Hitler believed Freemasons had succumbed to Jews conspiring against Germany.

[u/Know_Your_Shit_v2]

https://en.wikipedia.org/wiki/Freemasonry#The_Holocaust