Belief in intelligent design destroys only one belief system, that of those who have accepted on faith the origin of man from a single celled organism.
If you wish to examine evolution in it's observable state, I don't have a problem with it. I don't even mind the study of what seems to some to be implied. I do draw the line at teaching things that have not been proven, to be irrefutable fact.
That is false on several levels. First, belief in intelligent design as a scientific concept destroys the very foundation of scientific reasoning. Second, universal common descent is hardly a faith-based precept. It is supported by: the universality of the genetic code and other cellular features as well as the phylogenetic tree based on fossil evidence.
I accept Christ based upon spiritual faith. Has it been proven that Christ was the son of God? No.
I accept God as an article of spiritual faith. Has it been proven that God exists? No.
Science is not about faith, it is about empricial observations. You're having trouble with that concept.
Michael Behe disagrees with you:
I clearly write in my book Darwin's Black Box (which Scott cites) that I am not a creationist and have no reason to doubt common descent.