Keep reading. The passages refer by way of ANALOGY to early Hebrew Christians' disparagement of gentiles as "unclean" because of lack of circumcision, etc. It refers to PEOPLE not food, and ended with God admonishing, "Call not thou unclean what I have made clean."

Besides, Peter's Boss said in Matthew: "Think not that I come to destroy the Law (Torah) nor the Prophets" (teachings in Isaiah, Jeremiah, etc.)--"I come not to destroy but to fulfill" (he challenged the Torah scholars to find ONE law he disobeyed). "Until HEAVEN AND EARTH PASS AWAY" (look around, they're still here) "one yot or one tittle shall in no wise pass from the Law until all has been fulfilled"..."He who breaks the least of these commandments, or teaches others to do so, will be called least in the Kingdom of Heaven."

If the Impostor Paul is resurrected as a cockroach in the Kingdom of Heaven, it'll be more than he deserves. He taught against the Law throughout his ministry. Same for the "Christians" he's misled.