Hey, if you want to disobey Christ, that's your baby.
I would agree with you that it would be an abuse of power to stop them because of their beliefs.
That is a clear abuse of power. And, if he did that, he deserves to be reprimanded or even let go.
However, if he stopped them for probable cause, I have no objection to him mentioning his faith to them.
Now, the letter did cross the line.