Possibly.
An individual murder means it is unlikely to have an impact to you.  A serial killer will often impact a demographic in a city. A mass murderer will often impact a demographic in a large area or country.  A terrorist will usually target a demographic in many countries, but on a much smaller scale than a mass murderer.<p>I currently think a mass murderer would be a greater threat to the world collectively, but the terrorist triggers the fear that any location might be attacked.  Hence, while much less destructive, has the &quot;me&quot; factor that pulls heart strings of society at large.