I know what rigid thinking is. You brought religion under question. As a saved Christian, I know my relationship with our Lord Jesus Christ. If you wish to ignore finding Christ, you will find yourself in an unfortunate situation on judgement day. The path to heaven is often missing by 18 inches. You head my think there is a God, but if you don't give your heart to our Lord you will be passed over.

Maybe condemning your professor to hellfire isn't the smartest thing to do? Maybe if the student was less paranoid, he wouldn't assume that bringing up another religion meant that I was "questioning" his.