"Call me anti-religious if you like, but I don't think this guy has any business sending out letters to people he's interacted with in a professional capacity to come and visit his church."
He is bound by his service to Christ to spread the gospel. This is his chosen method of reaching out to people. Plus his actions are protected by the 1st Amendment which prohibits the Government from interferring with his religion or the way he practices it.
If people don't like the letters, toss 'em, just that simple. They haven't lost a thing except a few moment of time.
You have a very clear understanding of why Muslims want to kill infidels.
He is bound by his service to Allah to spread the Koran. This is his chosen method of reaching out to people. Plus his actions are protected by the 1st Amendment which prohibits the Government from interferring with his religion or the way he practices it.
The fact that he does it while on duty is problematic. As a representative of the government (or company, for that matter), he has a responsibility to pursue his ministry outside the bounds of his duties.
It's much the same as if I started using my company's time to evangelize my coworkers (or customers). I'd be shown the door, post haste.