By the way, I am not a Lubavitcher, but my partner who I am very close to, is a very frum, chabad mishichist. I have spent 1,000 hours discussing these things with him, as we travel weekly around the world.
I have no problem with him believing that the chabad rebbe is moshiach. I have yet to find a rov who can tell me why its against halacha for someone to have that opinion. Every time someone screams that its against halacha, apikorsis etc and they do not back it up with a mokor, I lose respect for them. Lubabs have all the answeres, yet we are screaming “apikorsis” with NOT EVEN one makor!!!!