Original: Berchtold was then replaced by Erhard Heiden" Racial requirements for membership The Nazis regarded the SS as an elite unit, the party's "Praetorian Guard," with all SS personnel (originally) selected on the principles of racial purity and unconditional loyalty to the Nazi Party.
Simplified: The Nazis saw the SS as an elite unit, the party's "Praetorian Guard," with all SS personnel selected on the principles of racial purity and unconditional loyalty to the Nazi party.