Beware the leaven of Rogue Theologians Matt 16

In Matthew 16 there is a determined focus of Jesus ministry to chop off the untruthful branches of His government sprung up on earth, while preserving the disciples to birth the Church in His own true image throughout the remainder of humanity in mortality. He would establish it through His resurrection and power, and confirm it wherever two or more of His exclusive messengers would gather believers to Him.

In the zeal of His journey depicted near the end of the former age, He has set His face towards heaven and the seat of His Kingdom and power over all creation. He refers to the doctrine of the scribes and pharisees as leaven, because it has not yet reached full maturity in the world, and indeed would not until the end of  another age as He describes it. The Age of His millennial Kingdom from Heaven.

Using Jesus' terminology in other ways than He Himself ordains it is misguided at least and untruthful at worst.

The ending and destruction of the 2nd Kingdom model by earthly constructions in Jerusalem of AD 70 is a demonstration of Jesus Christ in actual leadership from heaven to remove the seat of Satan in that generation and to bring forward the veracity of His millennial reign from the true Jerusalem in Heaven through the Church.
Ephesians 3:21

If you can receive it Jesus Christ, Himself in His own flesh is the second and final witness temple from heaven. The Apostles use a declaration of Christ that preceded Adam. They do not disparage the first witness temple that David and Solomon built for model of Christ in Kingdom, however they reach up to Him who formed it, and identify the New Jerusalem, or true seat of His power and give reference to Him as the second man Adam or true witness temple in final administration of priesthood to God.

Adam is the first, witness temple in the flesh, created in likeness to Jesus, and David's model was the first witness of Christ in governmental Kingdom, the second witness model temple of Christ in Kingdom, that was built prior to Jesus birth was established in representation of His coming and was obligated to identify Him as Christ in His person, which by virtue of it's untruthfulness in leadership, was no longer valid after His death and resurrection, and had become a Seat for Satan in contradiction against Christ and the Church.

As the second witness temple in His own body as compared to Adam, He destructed His own body and solicits a transfer of all to His Kingdom from heaven by His resurrection. 1 Cor 15:22, Col 1:13

Why else does Jesus address Peter in such a sharp rebuke except to save him from that doctrine and leaven by which many were divided away from Him in that generation.

And indeed He has disallowed it's rebuilding for generations, but will He disallow it forever or rather allow it once more again to demand an answer from all humanity at the end of the age as to the question, "who do you say that I am"?

The last days as the Apostles use it, refers to Christ in final administration of immortality bodily from Heaven, over all of mortality in intercession, until all of His work on earth is done.
1 Cor 15, 2 Peter 3