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.
More like doubly confirmed the need for the warning.