Thats because you are making the same "mistake" as the Christian fundamentalists make. You are reading passages literally. Jews dont do that. They look for ways to APPLY the passage.<quoted text>
I know about ritual purity and the like though I wonder why certain animals are not to be eaten as for instance why the meat of camel, swine, crab or rabbit meat (both treif) is any less healthy than cow or goat meat, while others can be killed and consumed and I also wonder about the logic behind the injunction that certain foods accompanied by certain other food items are also not permissible like meat and dairy cannot be mixed.
How sensible from the logical, scientific or mystical perspectives are any of these rules?
Kosher is a system. It involves creating boundaries. Between the sacred and the profane. Sure you can argue the content of those boundaries or what is within those boundaries but you are missing the meaning behind the process.
By creating boundaries, and observing them, you are raising your state of consciousness (or what you might call your spiritual level) during the act of eating.
Kosher doesnt just involve foods, it also involves proper conduct during the meal as well. As well as blessing and after the meal - which further raises your consciousness of inhabiting and performing within a sacred process and space.