The 9-11 attacks killed a piddling amount of people compared to road traffic accidents, or even people shot by the various US police forces. Probably construction and farm accidents both killed more people. I don't have the data.
The reality is that terrorists are a tiny proportion of the threats to the average American.
There are only two possibilities:
a) The European view: Americans are a bunch of spineless, knicker-wetting, yellow bellied softies, or
b) The American View: those Corporate American Commie bastards have infitrated our gummint!
I wish to propose a third way: both of the above!