Peter did not start eating unclean foods at this point. He understood that God was trying to teach him to not call any man common or unclean.
Health – The Dangers of Pork Eating Exposed
Pork-raising has come to be one of the great industries of this country, and since the supply is wholly regulated by the demand, it may be taken as a proper index of the prodigious quantities of swine’s flesh which are daily required to satisfy the gustatory demands of the American people. No other kind of animal food is so largely used as pork in its various forms of preparation. …