Indeed human ethics and morality has changed but little in the last 3000, therefore Machiavellian thinking is is still rational, no need for Torah or any other “divine” justification.

So yes, let’s be Machiavellian as long as it is rational, AND at the same time let’s contribute to transformation of our ethics and morality. This requires scientific (logical and experiential/experimental) approach to sociology, psychology, and indeed to religion.
We must transform religion to a (experiential)science just like we have transformed physics, chemistry and biology.
Moses’ relationship with God was experiential, it was not based on a dogma.