The Council of My Nation – Law and Chosenness – Adding to The Law

We now move to the next Christian objection directed specifically at the Rabbinic institutions which are so prominent in Judaism. Moses specifically commands the people “do not add onto that which I command you” (Deuteronomy 4:2, 13:1). How then can the Rabbinic leaders legislate new decrees and institutions? Is this not a direct violation of Moses’ command?