The problem with mysticism is that it attaches itself to Torah. When you have people that are true tzadikim that may have mystic intuitions that is not Torah, even when these intuition are true, [which mot often they are not]-still that is not Torah.
[I do believe Rav Nahman had great insight and was a great tzadik. But "Torah" does not mean insight. Torah means the Written Law and the Oral Law as contained in the two Talmuds and Midrash. "Torah" is not open to anyone adding to it at whim. But that is exactly what the religious do.]
