Interesting, considering how Judaism has recently done everything in its power to distance itself from Kabbalah. The Hebrew language and spiritual system is wonderful, but I'm not sure of the merit or utility of claiming exclusive purview. Personally, I have found great value and spiritual growth studying it from an extra-Semitic lens.

"People of all faiths are welcome to study the teachings of this Order. B.O.T.A. recognizes Qabalah as the root of Judaism and Christianity. The Order’s ultimate purpose is to hasten the true Brotherhood of mankind and to make manifest the truth that love is the only real power in the universe." 
https://www.bota.org/bota/about-us