What nazi ideology led to the mass murder of jews known as the holocaust?

B) The belief that white non-Jewish "Aryans" were a superior race.

Hitler believed that there is a superior race, the "Aryans", which consisted of white people and Germans. Non-Aryan's included, for example, but not limited to, Russians, Jews, LGBT's, etc. Those who Hitler deemed 'Non-Aryans' were sent to labor or death camps, which, afterwards will soon be known as the Holocaust.

hope this helps