Well yeah, I've been in the situation twice of having a psychiatrist and later a therapist assume I am Christian and talk to me about God, Church, and even scripture.

This soooooooo goes beyond the bounds of professionalism. One even, when I told her I was a non-believe, told me I needed to go to Church. They shouldn't even be in their chosen professions if they allow their personal religious beliefs to come up in a session. This is so fundamentally wrong.