I don’t know why the Rebbe never got to meet Moshiach.

The Rebbe was as Moses to the Jews.  Moses in his righteousness never made it to the Promised Land, and the Rebbe of righteous memory never got to meet Moshiach.  Somehow, these two leaders both beloved, and both whom changed the course of history forever, died in the exile of idealism.  Noah was different.  Noah pled for no person, and Noah got to see the promised clean world.  Had Noah pled for anyone, he would have probably been Moshiach.  Noah had no nation, while differently Moses is the focal point of all that is Jewish in Judaism.  Had Moses loved other nations as much as the Jews, he probably would have been Moshiach.  With that in mind, perhaps the people in the Messianic age will find a version of living that is nationalism lite.  I specifically like www.chabad.org because it teaches nationalism lite.