You'll notice there are no zombie marches in places like, say, Libya. That's because the ghoulishness that people play at in the bosom and safety of Western cities is very real and very deadly in Tripoli and other "Arab Spring" locales. And what are pretend zombies compared to this sort of horror--people filing past and jeering at a bullet-ridden corpse being kept on ice in a meat locker?
Update: The deep freeze where the body is being kept (kind of like a Weekend at Mouamar's, no?) is located in Misrata, not Tripoli.