It is an adoption of middle platonic and neoplatonic philosophy together with the Gnosticism of early Christianity in what is called emanation theories.

My point exactly.

Good info on the distinction between Kabbalah and neo-platonism.

There were Christians who became involved in the evolution of Kabbalah Pico della Mirandola is a prominent one. Johann Reuchlin is another one.

They were probably crypto-jews. Obviously one can't be a Christian and a Kabbalist at the same time. But at this point the effects of the schism were at full force and Western theology was already ridiculous and anti-christian.