Kabbalah versus Charlatanism of Pseudo-Kabbalists
Certainly the study of Kabbalah(esoteric literature) is authentic and part of the Torah. We know that the great Rabbis that we all revere—the Ramban, Rav Moshe Cordovero, the Ramchal, the Wilna Gaon, Rav Shneur Zalman (Chabad), the Malbim, Rav Chaim Wolozhin, Rav Yosef Hayyim of Baghdad--and many other luminaries spent many hours in its study and produced brilliant literature. Beyond that, didn't Chazzal (Chagiga 13a) themselves deal with these subjects?