Well, there was actually a study about 2 years ago released in the U.S. that said eating pork is tantamount to putting jet fuel in your car: you can do it, but it will eventually kill the engine. Also, comparing digestion times for the pig and cow, the pig needs only 3 hours to digest its food, whereas a cow needs 24; the toxins the pig gets go directly to the meat and fat, although any toxins the cow receives are eliminated by doing its business in the pasture.
As for all Christianity, only the “Christianity” that strictly adheres to the Bible forbids pork and other scavengers being consumed, as most “traditional Chrisitianity” does not. For example, I’ve yet to find a Baptist, Methodist, or other Protestant denomination attached to “traditional Christianity” that eschews pork. I’ve only seen Jews or anyone connected with the ancient 12 tribes of Israel that follow this (the Turks are from Jacob’s brother, Esau, and therefore forbid pork consumption; the Arabic people are largely from Ishmael’s line [from Abraham], so they also forbid pork). Specifically, Deut. 14 3 starts the section of “clean and unclean meats.”
Heb. 8 5 defines the Old Testament as the “shadow” of things to come. In other words, the Old Covenant was based on physical promises–had Israel only obeyed the letter of the law (not the spirit, or thought), it would have received physical blessings, such as rain in due season, abundant crop yields, divine protection from enemies, protection from plagues and diseases, no infant mortality and prosperity to the nth degree–all for just obeying the commandments. The “blessings and cursings” chapter regarding this is in Deut. 28.
Heb 10 1 outlines how sacrifices were only intended to show basically two things: that sin is very expensive (raising a steer can cost FFA kids from 2-8k) when commited and that sacrifices to remove sin foreshadowed Christ’s ultimate sacrifice. However, Christ never did away with the law–made plain by Mat. 5 17-18–he only made it fuller. This means Christ meant both the letter and the spirit to now be kept. It would be accurate to categorize the New Testament as the “2.0” version, since the New reflects the Old in many ways. In fact, Gal 3 24 reflects this (as many scriptures in Paul’s epistles): the “law” (the Old Testament, how writers referred to it in the Bible at that time) was to guide us to a more fuller understanding, or to lead to the New. The “schoolmaster” in this verse is from the Greek for “a tutor” or an instructional guide that leads a small child by the hand. The inference is the “law” consists of the 'first steps" in obedience; eventually, once the child matures into an adult, it has had time to see the benefits of obedience as well as the consequences for disobdience. Once an adult it should realize that obedience to such things is in part its own reward, that such a thing is in its best interests.
Not eating pork is but one of the things forbidden by the Bible, as those things that are forbidden are intended as guides for good health for all and peaceable living with one’s fellow man.