What's confusing about this is that the Noahide followers use the Talmud as a source of information where they base their beliefs in this cult. The Talmud, upon which the Zohar is based, also justifies the murder of Gentiles:
Sanhedrin 57a. When a Jew murders a Gentile (Cuthean), there will be no death penalty. What a Jew steals from a Gentile he may keep.
Talmud Minor Tractates. Soferim 15, Rule 10. This is the saying of Rabbi Simon ben Yohai: Tob shebe goyyim harog ('Even the best of the Gentiles should all be killed'). (My 5 rating is only because I'm obviously against murder)