@Gadolhadorah We would say OK, that’s nice. What does the location of Moshiach’s HQ matter?
@YC GEVALDIG I can’t address every point you made, and a lot of them have been addressed in previous comments, but I’ll pick a few low hanging fruit to focus on.
In Halocho, Rishonim and Achronim there were many opposing opinions and each had different Pisukim to add credence to their claim.
Pisukim to add credence to their claim. The “extremists” (who are much more mainstream Chabad than you make them out to be) do not. They have Sichos and Likutim from Rav Schneerson ZT”L which are not only possible inaccurately recorded, but are often vague and out of context. Which brings me to the next point “from the point of view that they are heretics”. Yes. If they believe in something that goes directly against the Torah and meforshim with the only basis being a line on a 20th century sefer written by some random Chabadsker claiming to quote his Rebbe ZT”L, that is heresy.
As for taking advantage of all the good Chabad does in the world, I do not see a stirah. As a frum Jew, I assume every Chabadsker is a frum Jew unless I have good reason to believe otherwise. So until I see a picture of Rav Schneerson ZT”L on the Aron Kodesh (Ch”VSh) I will assume that the Chabad house is a regular frum shul, hechsher, sukkah, whatever.
And no one is denying the gadlus of the previous Rebbe ZT”L. He was a gadol b’Torah, that is certain. It’s certain things he may or may not have said, along with the actions of his followers, that people take into question.