Why should there be a religious test at all?
As I see it, they desire that when one commits, sees, or has to instruct an evil event, that they are numb to the way the unions/administration wants to handle the outcome.
Like liberty, if we do not hold Christian characteristics that uphold good values and morals, it cannot last. Taking on even one of the 7 deadly sins leads to letting evil take hold of your life.
Not standing for something you will fall for everything.