Under no circumstances should a person be denied admission into a university based on his faith. However, a university does the right to deny a person admission if their high school curriculum does not meet the admission their admission standards.
Therefore, an Alabama Bible college can deny admission to a person whose high school science background is based on evolution and Harvard and Yale can deny admission to a student whose high school science background is based on creationism.
The guns of govt through the court system and instigated by the ACLU would prevent this.
Harvard and Yale can deny admission to a student whose high school science background is based on creationism.
Ironically, these institutions wouldn't exist without creation believing Christians.