Was there a problem with Google?
The OP's argument doesn't really make all that much sense, at least in its application to kashrut law. In a (most basic) nutshell, it's essentially a list of dietary laws outlining which animals are considered treif, and for those that are not, rules governing the manner in which they are slaughtered.
Not too sure how much of a discussion we can get going in regards to the laws themselves. I certainly have no interest in discussing the niceties of such dietary laws, and if anyone does, they would probably be better off consulting a Rabbi (actually, given how incredibly dull such a conversation would be, I think we'd all be better off). Instead, I believe the practice of kashrut law today, along with other religious observances, makes for a more interesting topic.
While many the health and hygienic issues aren't really much of a concern today as they were a few thousand years ago, I maintain that the observance of dietary laws still has an important place in the world today. In an age when society is becoming increasingly secular, and even in Jewish circles where more and more people are becoming reform, 'being kosher' gives people another way of expressing their faith. I see it more as a cultural and symbolic gesture than anything else, and many other religions have similar practices (ie. expressions of faith).
And in regards to circumcision, I ask, why do Christians get baptized?
