Most people will easily rationalize this away and just think that he was a Muslim after all. Good Christians don't have to worry about a thing (except Muslim terrorists of course).
In fact, some might conclude that such a set of circumstances warrants the investigation described, especially given this permanent state of fear in which many now live.
In any case, I do believe the "it won't happen to me" rationalization is one of the biggest reasons people show little concern. And, for those who are concerned, a sense of powerlessness is probably the biggest obstacle to action.
Truly, if it changes one person's mind then it's done some good. This alone won't change anything but spreading this to allow people to see there are kinks in the armour will allow people to perhaps vote in the future for difference.
When the majority is against something, sometimes some good can be done. Not always. The government is all powerful, but there is a chance.