I'm on my phone, but here is a quote from the ACLU[1]:

> Instances of institutions and individuals claiming a right to discriminate in the name of religion are not new. In the 1960s, we saw objections to laws requiring integration in restaurants because of sincerely held beliefs that God wanted the races to be separate. We saw religiously affiliated universities refuse to admit students who engaged in interracial dating. In those cases, we recognized that requiring integration was not about violating religious liberty; it was about ensuring fairness. It is no different today.

This is a good write up about religion and Loving v. Virginia[2].

[1] https://www.aclu.org/issues/religious-liberty/using-religion...

[2] https://ir.lawnet.fordham.edu/cgi/viewcontent.cgi?article=55...