Not gonna lie, this makes me deeply uncomfortable. Kabbalah is just a word for Jewish mysticism. It is closed practice and non-Jews aren’t supposed to delve deep into it, not because Jews have this weird sinister desire to hide this hidden knowledge but because it has gotten us murdered in the past. The word cabal is specifically in reference to Kabbalah. Alongside that, most resources on Kabbalah you find online is deeply inaccurate or completely misinterpreted outside of the specific Jewish context. Within the religious context of Judaism though, there is a commonly held opinion that non-Jews who attempt to study Kabbalah will be driven to madness by it.

Eh, Hermetic Qabbalah has been a part of Western Esotericism since the 17th century, and one of its foundations. I would say its a separate spiritual practice inspired by the Jewish Kabbalah, but wholly separate from it.

Yeah, if I remembered it right, there's some source on that site about difference between Jewish Kabbalah & Hermetic Kabbalah.