“Why would somebody believe the rabbi shneerson is mashiach? You don’t have to believe that.it isn’t complicated .i and certainly won’t believe anyone is mashiach until they fulfill all of requirements listed in the rambam.”
That is quite the Catch 22. So when a Ben David arises to be king and he says to you lets go fight the wars of Hashem and build the Beis Hamikdash you will tell him, “listen buddy, I won’t believe you are Moshiach until after you fulfill all of the requirements,” and therefore there never will be a Moshiach and there never will be a building of the Beis Hamikdash R”L