I'm having a hard time with this one. I often criticize Evolution (and science in general) because I see it as a Religion. That doesn't make it wrong, but I think scientists use an awful lot of Faith (materialist, naturalist Faith) in propounding their theories. They don't like to admit that it's just a priori Faith, but it is. I've encountered many Scientists who scoff at Christians as ignorant "believers" (note: not all scientists are like this) but these same scientists place themselves on a pedestral -- they have "scientific proof". I think they fool themselves.
Having said all that, I think we have competing religions here. The materialist scientific professor does not want to support self-professed believers in the competing religion (Christianity). Can the Constitution force a Jew to pay for the construction of a Church? Can it force a Scientist to help Christians infiltrate the halls of Science?
In a way this is like the McCarthy Hearings (which I think were good things). It was not a crime to be a Communist in the 1950's (or now). And it was not a crime to keep your political affiliation a secret. HOWEVER, people had legitimate fears about Communists. They often did not want to work along side of Communists. They also did not want to work alongside people who were secretive about their politics. This is about the right of association.
In the 1950's, many were blacklisted because other Americans didn't trust them. Hey, that's life. I think this professor is doing the same thing, and I feel uncomfortable saying its wrong.