Mount Sinai and the Sermon on the Mount

In Matthew 5:17-27 & 5:48, Jesus Himself clearly declared to His audience: "You must not even begin to presume I have come to start demolishing either the Law [alias the Pentateuch] or the Prophets! I have not come to start demolishing, but to finish constructing…. For I tell you [all], even at the melting away of the Heaven and the Earth when all things have finished occurring — not one jot or one tittle will ever melt away from the Law [alias the Old Testament Scriptures]….

"Therefore whosoever starts and keeps on loosening even one of the least of these Commandments and shall thus keep on teaching people — shall be called the least as