The GP poster is right--the threat to the average person from terrorism, from all sources, is tiny compared to, say, the risk due to extreme weather....or getting hit by a bus when crossing the street. Humans don't tend to respond rationally to fear, and tend to over exaggerate the risks of shocking things like death from terrorism. It is so common that some people came up with the idea of micromorts, so that one can reliably compare risks of unrelated items. Terrorism results in pretty tiny micromorts compared to, say, getting stuck by lightening.

https://en.m.wikipedia.org/wiki/Micromort