You seem to think encouraging someone to become a Christian is the same as encouraging him to become a Muslim.
I guess that’s where you made your mistake.
No, I don’t
But that is how the law sees it.
You have to take your persona; feelings out of it for a moment and look at this objectively.
When anything, other than the directions necessary to do the job, comes from a supervisor the implied message is always “do this or you’re fired/demoted/have advancement stalled.”
That cannot be tolerated in the workplace. Regardless of the side or faction it comes from.
Its not the message that matters to the law, its the implied coercion from a superior.