you did not answer the question - something about hidden in your book - as usual though you fail to respond to what that is.
Its very simple. In the vernacular of every people nation and language people have compared other people to plants, animals, insects etc., to either praise or insult ever since people could talk.
That being said, kosher law is not about the flesh of animals, whether clean or unclean. The hidden subject of flesh is teaching, whether clean or unclean, the described animals representative of specific human archetypes.
Knowing this solves many mysteries such as talking serpents and donkeys, the dead coming to life, paralytics being healed with a word, the blind seeing, the deaf hearing, the ascension of mankind, the command of Jesus to "eat my flesh" etc.
The hidden instruction has nothing whatsoever to do with food.
The instruction is to stand guard over the purity of your own mind by distinguishing between clean and unclean teaching. Unclean teaching can defile and contaminate your mind, your perception of everything, and consequently how you see, think, feel about and respond to everything in life.
Failing to do so can result in the loss of your own sanity, seen as a curse or 'the death' by the unknown authors.
Once you have cleansed your mind from every cause for stumbling in thought and action according to that instruction God himself will come to you and make everything known to you.
Do it. Its easy.
If that teaching from God was not buried and hidden in the written word that wisdom would have been lost to time and the world of mankind would remain in chaos, without shape or form and void, until the end of time..