This will never happen not only because the messiah is only a myth and not real. A large part of Halakha was never active in the Real World, only in the imagination of theorists. Consider the death penalty, for example. Jews did not have the authority to impose it, so the creator of the Talmud had to imagine its real use. To execute a person takes Witnesses and a Warning given to the killer as he is about to commit the crime. Do you envision circumstances when an armed murderer is issued such a warning? Nonsense. Another example, financial matters. Halakhically, you cannot sell a debt (bond) to someone else. Shut down the bond market.. It is true that the dreamers cause damage with their zealotry, but this is only proof that they haven't thought out their silly dreams. The good thing about it all: We are able to put the Shariah-promoters in perspective.
Yemen's Houthi rebels commit to peace plan in letter to UN chief, BBC reports (Haaretz)
from the article: Do Israeli liberals need a State of Tel Aviv?