Human nature is according to the Tree of Knowledge of good and bad. Man believes in countless myths that he himself invented. We can call this Avodah Zarah, but actually it is according to nature.
It is the will of HaShem, as the response to human nature, which He Himself imposed on man, to cloth the Truth of the Torah Kedumah according to the Tree of Knowledge. In other words, human inventions were inserted in the Torah, so that it would be the heart of one of the natural religions of the world, i.e., Judaism. The purpose of this is to reveal the Tree of Life, to those who merit it.
Very few saw this state of affairs. They could not speak, or write, freely as this was a secret guarded for the time of the Geula.
