A willing member whose purpose to be in the party was to dismantle it.
EDIT: BTW, how would you know they were committing genocide, when many of the soldiers didn't know until after the fact? Hindsight is one hell of a thing.
Okay, let's just ignore the genocide.
Where were all these jews being shipped to?
What was happening to the jews when they disappeared?
Did no one think sending folks to labor camps wasn't and taking their property was kind of fucked?