From a reader comment in the Boston Globe:

In the last ten years, average number of Americans killed by:

Islamic jihadist immigrants: 2
Right-wing terrorists: 4
Islamic jihadists (total, including American citizens): 9
Armed toddlers: 21
Lightening: 31
Lawnmowers: 69
Being hit by a bus: 264
Falling out of bed: 737
Being shot by another American: 11,737

If you're scared of Muslim immigrants, then you are a coward. Plain and simple.