http://www.inner.org/nonjews/kabbalah-for-nations-monotheism.php
...Monotheistic consciousness, which started with Abraham, and which became the spiritual inheritance of all Jews, originates in the World of Emanation, where nothing stands apart and separate from the Almighty. Because of this, monotheistic consciousness allows a person to see through the multiple manifestations of the Divine that seem to fill the world around us and thereby help him or her retain perfect faith in Gods absolute Oneness.
However, non-Jews did not receive Abrahams spiritual inheritance and therefore do not possess an innate monotheistic perspective on reality.
Consequently, a non-Jew may believe, theoretically, that God is One. But, as soon as questions about Gods actual manifestation in reality arise, in the mind of the non-Jew, the description of God tends to take on some form of plurality, the exact nature of which is irrelevantit could be a duality, like the Chinese Yin and Yang, or a trinity, like the Christian model, all the way to full-fledged polytheism. The mind rooted in the consciousness of the three lower worlds creates a division in Gods true unity, a division that tends to degenerate into idol worship, as stated above.
The only remedy for this innate tendency to perceive God as a plurality (i.e., polytheism, or pantheism as the case may be) is for a non-Jew to bind his or her consciousness to the Torahs universal teachings. The essence of the Torah that lies within its every word is that God is absolutely One.
That is the origin of the sages saying that every word of the Torah is a Name of the Almighty. The subliminal and conscious message forever transmitted by the Torah to both the Jew and the non-Jew is the message of Gods absolute and undividable unity.
I agree with you that any expression of G-d as a multiplicity, such as wideawake’s understanding of the Ein Sof, is not a Jewish concept and, to a Jew, is heretical. That is where I was going with my questions.