The problem with "Torah Scholars that are demons" that is brought in the LeM I:12 of Rav Nahman of Breslov and Uman, really is an open Gemara in Shabat: "If you see a generation that troubles are coming upon it go out and check of the judges of Israel for all troubles that come into the world come only because of the judges of Israel."
So you see it was merely the fact that Rav Nahman choose to emphasize this point for some reasons unknown to me that makes it significant. But it is not as if he was the first to discover it.
To tell who might come into this category however is more difficult since Rav Nahman gives relatively few hints as to what it is that turns a person into a demon.
What my feeling about this is that the best path is to be safe and follow as closely as possible the straight path of Torah of the Gra, and Rav Israel Salanter, and Rav Shach. [Which would be in a practical sense to learn Torah in both in a in depth session and besides that a session of learning quickly and an emphasis on the Ethics of Torah that is the essence of Torah]
So you see it was merely the fact that Rav Nahman choose to emphasize this point for some reasons unknown to me that makes it significant. But it is not as if he was the first to discover it.
To tell who might come into this category however is more difficult since Rav Nahman gives relatively few hints as to what it is that turns a person into a demon.
What my feeling about this is that the best path is to be safe and follow as closely as possible the straight path of Torah of the Gra, and Rav Israel Salanter, and Rav Shach. [Which would be in a practical sense to learn Torah in both in a in depth session and besides that a session of learning quickly and an emphasis on the Ethics of Torah that is the essence of Torah]
