Who's censoring Facebook: The powers that be or the forces of the mob?

Recently, there have been reports that content involving the current Israeli-Palestinian conflict is mysteriously disappearing from Facebook. The Jewish Internet Defense Force (JIDF) has complained that “many threads in various pro-Israel and pro-JIDF groups have mysteriously disappeared,” while others have complained that anti-Zionist content has disappeared, and one girl alleged that Facebook has prevented her from using hashtags such as “#gaza” and “#palestine.”