By that logic saying he's God would have accomplish even more. Of course the more you idolize someone the more you'll go in fire for his word. It boils down to what is normative practices and the terms like Nasi/Moshiach Hador is likely beyond that.
I really don't know why you would say that. You also agree that there are lunatics in Lubavitch, and you don't hate them.The level of the Dveikus to the Rebbe is indeed to be admired, but no need to almost sound like a Xtian chas veshalom.
Unfortunately, there were many fights once upon a time. I'm talking about people who respect Lubavitch a lot and can't reconcile the factions who make the Rebbe as almost something Xtians would do.
There is halacha and there is anti-halacha. Obviously saying a man is a G-d is A"Z, so that logic is pathetic.
Other religions are all based on Judaism. Doing something they would or wouldn't do doesn't factor into how we practice Judaism. We created moshiach, not them and we don't stop obsessing with it just because they're obssessed with it.
You don't like what the Chabad Chassidus says about Nosi Hador or a Tzadik Gomer? Nunu.
You want what Lubavitch has done around the world, but not the devotion to a Rebbe where you would go to the end of the Earth and dedicate your life for his needs? Well, you can't have your cake and eat it too.