The money was available and the person qualified for it apart from any religious considerations. He was subsequently denied access to it solely on the basis of religion. Had he not been denied the funds, it would not place any further requirement to provide funds for any other religious activity because religion had nothing to do with qualifying for the funds in the first place.
While this is true, it is selectively true. For example, a Mormon Bishop is NOT required to have a Divinity degree. Yet, Mormons pay taxes like everyone else. Some Baptist ministers are ordained without a 4 year Divinity degree, as are Catholic Priests. In these cases, we have specialized religous groups who fund their own teachings. This is as it should be.
Would you be upset if you had your taxdollars funding students interested in becoming a Mullah or Buddist monk? If I wanted to become a Satanic High Priest, would it be fair for me to expect you (the US Taxpayer) to fund my job? How about a Voodoo High Priest?
Unlike a degree in Art, Engineering, Math, Biology, Medical, Law, Humanities; a degree in Divinity serves only to benefit a select group of people.