
The second Temple of Jesus' time was constructed over a period of thirty to forty years. If the Temple were to be constructed today, it would be built in a fraction of that time. The Temple Institute in Israel has already made many of the sacred artifacts needed for use in the Temple itself.
The only thing that seems to be missing is the political will, the 'go ahead', to move this process forward. All things humanly possible are being done to prepare for the rebuilding of the Third Temple.
However, hugely significant problems remain which must be overcome before even a stone can be put down.
For political and safety reasons, rebuilding a Temple would seem almost an impossibility at present. This is because Islam currently controls the Temple Mount and for Jews to destroy the Dome on the Rock and the Al-Aqsa Mosque so as to build the Jewish Temple would likely provoke an immediate world war.
Amazingly, these political and safety impediments on rebuilding the Temple are not the most significant problems.
The current raging debate within Judaism is exactly who has the authority to begin the rebuilding process of the Temple itself? Is it God, the Messiah or someone else? Nobody really knows and there is no consensus on this absolutely vital issue within Judaism.
Without resolution of who has the authority to rebuild there can be no Temple, and these are the reasons why."