How about someone who is not religious applying to a position at a "Religious" employer? I have applied to positions at a local Christian, I use the term loosely, School for an Accounting Clerk position and they required: signing a statement of complying with their beliefs and a note from my "Pastor" stating I was good, church going, person. Is this discrimination? How about the Church run Hospitals that require you to sign a statement of, promoting healing through the religious priciples of their particular denomination. Is that discrimination? Oddly enough, I applied at a local Jewish Temple for an Accounting Clerk position and the only questions asked pertained solely to the qualifications for the position. Nothing about any religion, Jewish or otherwise.
Is it discrimination to not hire a Christian Scientist to work in a doctor's office or pass up a Roman Catholic to work at Planned Parenthood? I think an employer would be foolish not to research a candidate. Anyone who's active in their church or any other activity is going to end up on the internet and those activities might sway a decision one way or another.