There are many who insist that "pork today is different from pork in Biblical times." Well, that's not true! Pork is still pork and God said the pig is NOT a "clean" animal - period. Why? Because as outlined in Leviticus, there are certain criteria to follow.
Leviticus 11:2 "Tell the people of Isra'el, 'These are the living creatures which you may eat among all the land animals: 3 any that has a separate hoof which is completely divided and chews the cud - these animals you may eat. 4-6 But you are not to eat those that only chew the cud or only have a separate hoof. For example, the camel, the coney and the hare are unclean for you, because they chew the cud but don't have a separate hoof; 7 while the pig is unclean for you, because, although it has a separate and completely divided hoof, it doesn't chew the cud. (CJB)
Take a really close look at these verses and ask "What is it about these animals which differentiates them?"
Do you see it? Clean edible animals only eat grasses! They are distinguished by a completely split hoof and chewing the cud! All others eat meat (or junk - the pig for example)! Same goes for carnivorous birds and sea life designed to clean the ocean or river floors....
Yahweh was clear from the beginning about what we could and couldn't eat. Leviticus 11 and Deuteronomy 14 provide a list of animals that are not to be eaten as food; and included in this list of "unclean" foods are some of man's favorites: pork, shrimp, lobster, crab, catfish, squid, rabbit, squirrel, etc. - things that were meant to be the "garbage disposals" of the world! The New Testament, on the other hand, seems to indicate that God changed His mind somewhere along the line:
MARK 7:18 And he said to them, "Are you so lacking in understanding also? Do you not understand that whatever goes into the man from outside cannot defile him, 19 because it does not go into his heart, but into his stomach, and is eliminated?" (Thus he declared all foods clean.)
A footnote in the Aramaic English New Testament provides insight:
This chapter showcases one of the greatest discussions of oral versus written Jewish law that exists in these writings of the Renewed Covenant. In many ways this presages the heated exchanges that would be recorded in the Talmud some 200 years later. However, a major misunderstanding of this verse found its way into the modern translations with the parenthetical comment "in so doing Y'shua declared all foods clean."
Neither Aramaic nor early Greek manuscripts include this in the text, which is clearly an attempt by Gentile or Christian editors to abandon Torah's dietary laws. The point being established is that if you plot things like murder, lies, adulteries and so forth, then why be concerned about the food you eat, when weightier things are making you much more unclean than your food? Even if a person kept a perfectly kosher diet, but had such unclean thoughts, such a one would rank among the most unkosher of people. See Luke 11:40.