Obligatory “Muslims planned to kill Mo-toons newspaper” story.
As for that Muslim [neighbor] delivering packages, he is an enemy if he practices his religion. As long as he is seen as a Muslim, then his mere existence adds to the perception of Muslim strength in the community and makes those more belligerent than he is braver to commit violent acts. It is the mob that does the lynching, not individuals.
Just being able to say that there are X number of Muslims in a country will cow politicians to accommodate the most radical of the Muslim faithful. Sorry, but unless your delivery guy stops being a Muslim even in name only, he is aiding the active enemies of western civilization.