The very fact they are actually presuming to set dates shows they are wacky.
Furthermore, their insistence on a literal earthly millennium shows they are heretical, as the Church repudiated this doctrine at the Second Ecumenical Council. This is why the Nicene Creed has the clause “whose kingdom shall have no end.”
Moreover, this prophecy <<2009: Pope Benedict XVI suggests building three places of worship in Jerusalem, a Temple, a Church, and a Mosque, so that these three religions, Judaism, Christianity, and Islam, can worship in peace in the City of Peace. “For he did not know what to say, for they were exceedingly afraid.” (Mk 9:6). >>
shows his utter ignorance of the situation. There are already churches (especially Holy Sepulchre), mosques, and synagoges in Jerusalem.
Finally, the prophecies of St. Malachy were totally unkown for centuries after his death. His biographer did not even mention them. Many scholars consider them spurious.