Have there been any incidences of individuals or groups that have purposely triggered events, self fulfilling prophecy if you will, as a result of their belief that Moshiach has arrived? For example, I am aware that the Lubavitcher Rebbe took certain actions, mostly good in my opinion, to hasten the arrival of Messiah ben David. Shabbatai Tzvi did the same with a negative outcome. Other than those above has there been, or is there currently others who actively engage in a Messiah campaign. In this day and age I am concerned that someone or some group could, for example, trigger a war (Gog v'Mgog) under the false belief that it would usher in the Messianic Age. Thank you for your response.
The end of Tractate Makot relates a moving story of how Rabbi Akiva and the other Chachamim come upon the ruins of the Second Temple. Everyone else is crying and rending their clothes, but Rabbi Akiva smiles. When asked, he explains that the prophecy of the future Messiah could not happen until the prophecies of destruction had all been completed (and therefore the destruction is evidence that the final redemption will come).
In the text, the other rabbis are all comforted, and this is a nice ending to the tractate, but one wonders if this is a troubling hint of Rabbi Akiva's forthcoming support of the ill-fated bar kochva rebellion. It was ~70 years after the destruction of the Temple. Maybe he saw a parallel with the destruction of the first Temple.