Although in my view he is completely wrong, I half understand his reasoning. The problem is, his reasoning could extend to cover any world view so why stop at creationism? What gives that non-scientific 'world view' a right to be discussed in science class over any other non-scientific 'world view'?
Indeed, why stop there? Should we make time for the parting of the red sea in Physics class, or returning from the dead in biology?
Actually, the more I think of it, I don't even half understand his reasoning - the guy's an idiot. Also, despite his protestations that he doesn't believe in creationism, his religious convictions are possibly presenting a conflict of interest...