Many people, including many important and well-respected scientists, just don't want there to be anything beyond nature. They don't want a supernatural being to affect nature.
Michael BeheScience is not a game in which arbitrary rules are used to decide what explanations are to be permitted.
Michael BeheI find the idea of common descent (that all organisms share a common ancestor) fairly convincing, and have no particular reason to doubt it.
Michael BeheAs the number of unexplained, irreducibly complex biological systems increases, our confidence that Darwin's criterion of failure has been met skyrockets toward the maximum that science allows.
Michael BeheFor example, both humans and chimps have a broken copy of a gene that in other mammals helps make vitamin C. ... It's hard to imagine how there could be stronger evidence for common ancestry of chimps and humans. ... Despite some remaining puzzles, there's no reason to doubt that Darwin had this point right, that all creatures on earth are biological relatives.
Michael Behe