By disavowing the Zohar, Kabbalah and Toras Nistar, Bar Chayim, 55, for all his good points, will obviously, like many others, be deficient in Pnimyius HaTorah & the enlightement of the sechel that they impart.
The Vilna Gaon's Kol HaTor, another essential sefer that Bar Chayim has never studied, all about the Moshiach ben Yosef, the subject which R.Kahane clung to in his last years, states in Even Shleimah 2 that "The main part of the Geulah depends on the study of Kabbalah". Had he lived past 58, R.Kahane would undoubtedly studied and have mastered Kabbalah.