{ 1 } - irrational.
{ 2 } - false.
{ 3 } - both of the above.
{ 4 } - neither of the above.

Nazi moral beliefs are irrational -- since the Nazis wouldn't hold their beliefs consistently if they knew the facts of the case and exercised their imagination.

However, Nazi moral beliefs aren't false -- since moral judgments (according to prescriptivism) aren't true or false.