I believe a Kabbalist is not someone who takes other religions seriously. I suspect he will interpret them through his own esoteric lens. There's no reason any Christian should watch this if they wish to understand their own faith better and so its place on the board is questionable.
I also want to say that I intend to report this thread as I don't believe it belongs on this board as this board is for Christians who take their faith seriously.
I believe you're keen on being open-minded and considering all sides so I also want to say that you shouldn't just listen to what the Kabbalist has to say about the Abrahamic religions. Listen to what the various scholars of the Abrahamic religions have to say on Kabbalah. The Catholic and Orthodox Churches in particular have a highly developed theology and so they will be able to give you good, detailed critiques, if you seek them out.
I was a Gnostic once, myself, believing the Abrahamic religions to all be fake and to actually be a cover for something I won't say for fear of scandal so I think I understand your position. I think you just need to know that the ideas you're exposing yourself to are not new. There is a counter-argument to them, if you seek it.