If creationists pursue legitimate doctorates in paleontology, abide by the rules of science in their studies, and subsequently use their credentials to promote "intelligent design," should universities refuse to teach them? Should they be de-credentialized? This story is a fascinating one, but it doesn't seem to me to be a hard case. Of course, they should be allowed unfettered access to universities and advanced study. Here's the quote from a doctoral supervisor that sums up the liberal approach:
"We are not here to certify his religious beliefs. All I can tell you is he came here and did science that was completely defensible."
What he does with that information is up to him, and his conscience. There really is nothing more to be said.