I think there are few Roman Catholics in that part of Virginia.
You missed the point. Supposedly, the clergy at the Convocation were representative of the student body. If so, then I would certainly think there would be Catholic priests present as well as Episcopalians, Baptists, Methodists, Presbyterians, etc. Instead, we saw three non-Christian ministers and a liberal Lutheran. Further, I suspect the three non Christian clergy represented a very small number of adherents on the campus as opposed to Protestant and Catholic adherents.