Dini has done nothing, and I don't think he's in any mess at all.
Of course, I do not agree with your assessment of Dini's situation. He wrote the conditions and thus is liable for them. The university stands behind him and is also therefore liable for them.
The substance of the policy (within a publicly funded institution) is that it coerces the student to disavow his "cherished beliefs." That can be interpreted as a violation of any such students' first and fourteenth amendment constitutional rights. It is also discrimination based on religion and may even be criminal, even a conspiracy under section 241. It may also be the basis of a civil lawsuit. These are the worst things that could happen; whether or not they happen depend on the DOJ and the attitude of the university (IMHO.)
If the student never existed, or if he has no civil case or never files one, the question would still remain with the DOJ whether that particular policy is discriminatory.
I believe that it is clearly illegal discrimination under federal law, but I wish it would be resolved by wrist-slapping correspondence between the DOJ and Texas Tech attorneys and that the student would suffer the injury according to the Word and stand down.
Yes, I can remember my early days in kindergarten. I had a "cherished belief" in Santa Claus. By golly, don't you know it, by the time that government school was done with me, I had to give up my cherished belief. How horrible!
I suppose that was a bit simplistic. I'll put it another way -- students go to school to learn, and they are not supposed to end up with exactly the same information as when they started. School is not a place where the student is patted on the head and kept in ignorance. He should be exposed to the intellectual treasures that we in the West have accumulated over the long and dreary centuries. And by God, if he wants to take a course in biology, he should have some idea going in that it's not a course in Genesis. If this student doesn't like it, he should go to a bible college (which it seems he has done) and remain isolated from the things we have learned since the bible was written.
This insolent, arrogant, and ignorant student is trying to control the conduct of the faculty! He wants to dictate to his professors how they should decide things. I say, let him find a school -- and there are many -- which is more congenial to his educational preferences.