“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,””
So, when a Ben David who isn’t the Rebbe (because it won’t be) 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, we already have a moshiach. Go away.”