It's prohibited in The Holy Quran, which I think is enough reason for the faithfuls. Also, in Judaism, it's strictly prohibited, while hard core Catholics don't eat pork, but I am not sure about that. More or less, in most religion, Pork actually is prohibited or at least discouraged.
In Holy Quran, it's clearly prohibited consumption of pork. -
"HE has made unlawful for you that which dies of itself and blood and the flesh of swine and that on which the name of any other than ALLAH has been invoked. But he who is driven by necessity, being neither disobedient nor exceeding the limit, then surely, ALLAH is Most Forgiving, Merciful." Quran 2:173
Not eating pigs is CLEARLY mentioned in the Bible as well (Leviticus 11:07)
According to Jewish law, pork is one of a number of foods forbidden from consumption by Jews. These foods are known as "non-kosher" foods. In order for a meat to be kosher, it must first come from a kosher animal. A kosher animal must be a ruminant and have split hooves - therefore cows, sheep, goats and deer are all kosher, whereas camels and pigs (having each only one sign of kashrut) are not kosher.
Having said that, pork isn't the best diet either - it terms of quality as a food, it's probably at least twice the worse than any other red meat. Here are some insights why (no credit of mine, I just complied - can't post the link)
1) A pig is a real garbage gut. It will eat anything including urine, excrement, dirt, decaying animal flesh, maggots, or decaying vegetables. They will even eat the cancerous growths off other pigs or animals.
2) The meat and fat of a pig absorbs toxins like a sponge. Their meat can be 30 times more toxic than beef or venison.
3) When eating beef or venison, it takes 8 to 9 hours to digest the meat so what little toxins are in the meat are slowly put into our system and can be filtered by the liver. But when pork is eaten, it takes only 4 hours to digest the meat. We thus get a much higher level of toxins within a shorter time.
4) Unlike other mammals, a pig does not sweat or perspire. Perspiration is a means by which toxins are removed from the body. Since a pig does not sweat, the toxins remain within its body and in the meat.
5) Pigs and swine are so poisonous that you can hardly kill them with strychnine or other poisons.
6) Farmers will often pen up pigs within a rattlesnake nest because the pigs will eat the snakes, and if bitten they will not be harmed by the venom.
7) When a pig is butchered, worms and insects take to its flesh sooner and faster than to other animal's flesh. In a few days the swine flesh is full of worms.
8) Swine and pigs have over a dozen parasites within them, such as tapeworms, flukes, worms, and trichinae. There is no safe temperature at which pork can be cooked to ensure that all these parasites, their cysts, and eggs will be killed.
9) Pig meat has twice as much fat as beef. A 3 oz T bone steak contains 8.5 grams of fat; a 3 oz pork chop contains 18 grams of fat. A 3 oz beef rib has 11.1 grams of fat; a 3 oz pork spare rib has 23.2 grams of fat.
10) Cows have a complex digestive system, having four stomachs. It thus takes over 24 hours to digest their vegetarian diet causing its food to be purified of toxins. In contrast, the swine's one stomach takes only about 4 hours to digest its foul diet, turning its toxic food into flesh.
11) The swine carries about 30 diseases which can be easily passed to humans. This is why, in Bible it's commanded that we are not even to touch their carcase (Leviticus 11:8).
12) The trichinae worm of the swine is microscopically small, and once ingested can lodge itself in our intestines, muscles, spinal cord or the brain. This results in the disease trichinosis. The symptoms are sometimes lacking, but when present they are mistaken for other diseases, such as typhoid, arthritis, rheumatism, gastritis, MS, meningitis, gall bladder trouble, or acute alcoholism.
13) The pig is so poisonous and filthy, that nature had to prepare him a sewer line or canal running down each leg with an outlet in the bottom of the foot. Out of this hole oozes pus and filth his body cannot pass into its system fast enough. Some of this pus gets into the meat of the pig.
However, one Muslim scholar explained to me that, ONLY in case of saving life, IF no other edible (could be barks or leafs of tree) food is available, Muslims can consume that much Pork, which can keep him alive till support comes (condition applied).
So they are giving reasons logics and videos which are debunked 
