Rambam (Maimonides) taught 13 Ikkarim (principles) that are an authentic Torah intellectual belief system.
By dabbling in “Kabbalah”, which often does not represent an authentic Torah mesorah (tradition), or else relying on substandard Torah scholarship, or relying on biased Torah sources with an agenda, one may come to accept a false or erroneous Torah intellectual belief system.
It is important to study the 13 principles from authentic Torah scholars. An example of this is the excellent Artscroll English/Hebrew volume “Kisvei HaRambam” on the Rambam’s writings, including the 13 Ikkarim. (Note: I don’t work for Artscroll nor do I receive any compensation for mentioning this.)
https://www.artscroll.com/Books/9781422633021.html
It seems that the Rambam has been distorted or revised in various places to advance certain agendas which are contrary to the Rambam’s teachings.
An unfortunate example of a distortion of the Rambam’s Ikkarim is this page on the main Chabad site:
“The following are the criteria for identifying the Moshiach, as written by Maimonides: If we see a Jewish LEADER…INFLUENCES the Jews to follow the ways of the Torah”
https://www.chabad.org/library/article_cdo/aid/1121893/jewish/Who-Is-Moshiach-the-Jewish-Messiah.htm )
However the Rambam in Hilchot Melachim 11:4 writes “If a KING from the House of David will arise…and he will COMPEL ALL of Israel to follow (the Torah)”.
By misquoting the Rambam’s words where he states that Moshiach is a king who compels all Jews to follow the Torah, and instead claiming Moshiach is a “leader” who “influences the Jews”, the false notion of the deceased Chabad rebbe being Moshiach can be made compatible with the Rambam.
The deceased Chabad rebbe certainly did vital work influencing many Jews to observe Torah, but he was not a king, and in no way did he compel all of the Jews to observe the Torah.
TORAH METAPHYSICS 