Why are moslems not allowed to eat pork?
The simple answer is that pigs have been considered “unclean” by a number of religions, including Christianity and Judaism. Before we developed clean farming methods most pigs lived in the wild, and as a result they were often infested with worms.
Additionally, pigs share a large number of highly similar biochemical receptors to humans, which means they can carry and infect humans with viruses and diseases. Research has shown pigs were responsible for the Spanish influenza pandemic, which killed between 50 and 100 million people.
In WWI, the British camps kept livestock in holding yards next to their abattoirs. Wild ducks and geese would enter with the domesticated ducks and chickens, spreading avian influenza. From the ducks, it passed into the nearby stockyard holding pigs where they became infected with the influenza virus the wild ducks carried. As they carried the virus it mutated slightly. Just enough to infect humans.
As far as pork having very little muscle building material and an excess of fat, THAT is due to practices in raising the animal. In a feral state, they are loaded with muscles and have little fat, indeed, a full grown boar or sow can easily kill a human!
Before we had refrigerators the only way to preserve meat was to salt it.
As a result, some religions simply banned pork as a health measure.
These factors are no longer relevant today. Modern farming methods, and the introduction of refrigeration mean that we can safely eat pork. However, we must always cook it well.
The Bible prohibits the consumption of pork, in the book of Leviticus
“And the swine, though he divide the hoof, and be cloven footed, yet he cheweth not the cud; he is unclean to you”.
“Of their flesh shall ye not eat, and their carcass shall ye not touch, they are unclean to you.” — [Leviticus 11:7-8]
Pork is also prohibited in the Bible in the book of Deuteronomy
“And the swine, because it divideth the hoof, yet cheweth not the cud, it is unclean unto you. Ye shall not eat of their flesh, nor touch their dead carcass.” — [Deuteronomy 14:8]
A similar prohibition is repeated in the Bible in the book of Isaiah chapter 65 verse 2-5.
Today, we ignore these commands in the Bible because they no longer make sense.
However, because of the immutable nature of the koranic commands, islam cannot change the edict contained in the koran verse 5:3, “Forbidden to you (for food) are: dead meat, blood, the flesh of swine, and that on which hath been invoked the name of other than Allah.”
According to islam, the koran can never be changed because it is the direct word of Allah (their god) handed to Mohammad by the Archangel Gabriel. So no matter what scientific and farming advances mankind makes, islam will always be mired in the past.