Anybody who purports to build the third temple of stone, in pathetic rivalry to the true Third Temple, isn't a guy you'll want to follow.
We 3rd Templars (Orthodox Jews) believe that G-d Himself builds it (is building it right now) and that it will descend from spiritual to physical reality. No demolition and no contractors. So look at that, we have wriggled out of your warning [”Anybody who purports...”] all this time.
Lest one say that the Temple Institute negates what I say, they are doing all they can to be ready for service. It’s no contradiction at all.