Reddit mentions of The Thirteen Petalled Rose

/u/casabolg, generally the outlook toward other religions in Kabbala is the same as it is in most of Judaism. However, there is also a strain of Kabbalistic thought on this question, unique to it as a Jewish genre which is distinctly universalistic in its approach to other religions. If you're interested in it: check out the work of R. Elie Benamozegh, specifically his Israel and Humanity. In it, he puts forward an understanding of certain Kabbalistic ideas that leads to seeing all religions as having shared truths and that all are manifesting the same underlying reality in different ways.

In contemporary Jewish thought, R. Adin Steinsaltz has picked up on a lot of R. Benamozegh's ideas and integrated them into his own theological discussions, such as The Thirteen Petalled Rose