I shook my head over their bishop's comment - advising people to be sitting ducks! That's fine if he wants to do so but to state that innocent children should be left open to massacre is disgusting.
In Phoenix we have an exploding population of Muslims. We have a many strip malls that are predominately Muslim businesses. Many are concerned that it is only a matter of time before they become radicalized.
It would only take one lone radical to walk into a crowded church on Sunday, yell "death to infidels", and slaughter a hundred people. I don't think it is likely to happen soon, but it is certainly something to be aware of.