‘one who changes even one letter of Torah is as if he denied the whole Torah’ from Rambam
Devorim 4.2 ‘ You shall not add anything to what I command you or take anything away from it’- the Torah. Yes cults change Torah to suit themselves, they disrespect Hashem.
The ess;;;ines, collective ownership, communism, theft, not Judaism.
etc etc
We are not permitted to study cults, other religions, other philosophies