This is a link to a study which suggests that Americans are very scared of terrorist attacks (second place, after corrupt politicians). However, only a few hundred people have died due to terrorism for more than a decade in the USA. In comparison, many (and by many, I mean insanely many) more people die because of health- and crime-related issues, and yet, as above study suggests, Americans are actually also afraid of gun-control politics and Obama's lenient (for a lack of a better word) health plan, which seems directly contrary to what it should be.
Why are Americans so scared of terrorism, especially in comparison to clearly more dangerous threats?
Is there a rational reason for this, or is it caused by media propaganda and hysteria?