They are scared because they've never been actively hunted by an urban terrorist. Not only has he targeted cops he blames, but families also. A very scary turn of events for people used to dishing it out but never having to take it.
The fatal flaw with your theory that this comically deranged Dorner psychopath is some kind of Jason Bourne, Rambo, Dirty Harry, and James Bond all rolled into one is that he’s never demonstrated any competency at anything he’s ever done in his entire life. He’s a former Navy officer who can’t even steal an old man’s putter boat without fouling the propeller in the docking line. This fool couldn’t even plan his next wank.
I think it’s time to consider the likely possibility that Dorner is a 290 pound frozen lump of dead meat covered in 14” of fresh snowfall right now.