Incorrect. You do NOT have to explain a sincerely held religious belief. Questions around that cannot be asked, period. I've been through this process in the past. It's enough to say "my personal religious beliefs are ..."
In this case, it's enough to say "my personal religious beliefs are that I trust Almighty God with my health and well being. I do not need to explain further as per Title IX under US Law."
If one gets fired, they then have a case for Religious Discrimination which IS lawsuit territory.
Our HR department is dealing with this en masse right now due to about 50-60% of those of us in I.T. not being vaccinated and so many refusing filing religious exemptions.
If you're in a highly desirable / highly marketable industry industry, you've got your employer by the balls. The bank I work at knows this and isn't questioning religious exemptions. We have 300 open I.T. positions that we've been trying to fill for months. Letting 50% or more of our I.T. staff walk over this stupid "vaccine mandate" would be suicide for the bank and they know it.
Correction: It’s not Title IV, it’s the CRA of 1964,
That is considered "articulating your sincerely-held religious belief."
Having my employer by the balls is a Holy Sacrement to me.