Poor Communication
I always think that the pity of these situations is that in many cases, the concerns of operating crew could be reduced if the airlines involved were to make even the most basic attempt at managing the issue. In my experience, you get rostered for a flight to a "dodgy" destination, and there is either no communication at all, or a photocopy self brief sheet which says, in essence, "Don't worry, trust us" - most Crew have spent their professional working lives being taught by their employer why they should trust them as far as they can throw them.
I remember turning up for a hot-spot flight and meeting 2 of my crew who were on the point of refusing to operate: TV and radio news reports the night before and on the drive-in were relaying terrible stories & images. Those Cabin Crew with partners and children had been asked difficult to answer questions and inevitably, this had all combined to erode confidence. Eventually, they decided to operate, after some reassurance from the Flight Crew: My point is that this was all entirely avoidable. Intelligent and pro-active management would have identified and managed the problem in advance, but then how often do you see the words "pro-active", "intelligent" and "management" used in the same sentence? (except by managers themselves)
My view now? Those who take the decisions as to where it is safe to fly are not those whose remains will be spread over some third-world hell-hole slum suburb when it all goes wrong: I take all the advice available, read up and , only then if I am satisfied will I operate: If not, then I go sick. I don't feel guily about this, as in my view, if the airline had correctly communicated and managed the issue in the first place, the information available to me would have meant that my decision would have been to operate.