The difference between the Aryan Brotherhood and the KKK is how they prioritze their hatred. The Aryan Brotherhood follow Nazi ideology. According
to Nazi ideology, Black people are undesirable, but Jews are the most worthy of hatred. The KKK may not be too crazy about Jews, but historically
their biggest beef was with Black people.
With regards to the KKK, is it possible that Jews may have once been allowed to join or were at least not officially scorned by the organization? The
KKK has its origins as an anti-Reconstruction and hence anti-Black organization. There were undoubtedly at least some Jews in the south who may have
opposed the Reconstruction, and perhaps the KKK may have allowed them to join. Does anybody know?