March 2019 after applying the website to advocate in the wake of the 2019 Christchurch shootings that upcoming mass killers ought to goal and murder remaining-wing activists, instead of "random persons in mosques and synagogues", in order to efficiently silence left-wing activism. A report issued by the ADL and the Network Contagion Research Institute on March 12, 2019, observed that when Twitter bans "extremist voices", Gab's person base grows.