To yankel berel
Your point that they hide the fact that they have a different belief system is spot on. They do this because their ultimate goal is to rule all Jews. Obviously if they announced that they no longer accept Rambam or the Gemara that would force the foolish Rabbis who praise Chabad to abandon them. Therefore Sechel has to try to make it sound like Menace isn’t a Kofer but of course he is.