There is a difference between the Laws of Moses and The Covenants(Contracts) with The GOD of Our Fathers. An example of this is in the Law of Circumcision, where we have Genesis 17:
9 And God said unto Abraham: ‘And as for thee, thou shalt keep My covenant, thou, and thy seed after thee throughout their generations. 10 This is My covenant, which ye shall keep, between Me and you and thy seed after thee: every male among you shall be circumcised. 11 And ye shall be circumcised in the flesh of your foreskin; and it shall be a token […]