From the time of the Ari and onward, the wisdom of Kabbalah was permitted to be spread among all the nations of the world. After all, the world entered the era of the Mashiach (Messiah), and therefore any spread of the knowledge of Kabbalah is to the benefit of correcting the world.
And before that, there was a prohibition on the spread of Kabbalah, as it accelerated the development of the world, which was detrimental to the people of Israel. It turned out that egoistic forces accelerate their development, outstripping the development of the forces of bestowal, that is, Israel. 1
The prophet Yeshayahu (Isaiah) said that the nations of the world will carry the sons of Israel on their shoulders to the Temple, that is, toward the end of correction, to complete adhesion between the Creator and creations. To ascend the mountain of the Creator is hard work, which is beyond the abilities of the people of Israel—light desires, desires for bestowal. Therefore, the spread of the wisdom of Kabbalah among the nations of the world is so necessary—it is the engine that will push the entire correction upward to the Mashiach. 2
From the 3rd part of the Daily Kabbalah Lesson 4/16/18, Writing of Baal HaSulam, “Messiah’s Shofar”
1 Minute 0:00
2 Minute 7:40