While Twitter employed an army of censors deleting tweets by anti-Islam activists and concerned citizens, while suspending/banning Tweeters who disparaged Muslims for a host of legitimate reasons, Twitter, (as well as Facebook), was a Mecca for Muslim terrorists and their supporters who liked to show off their work by posting photos and videos of Islamic beheadings.
Thanks to MEMRI for archiving these Islamic beheadings from Social Media:
When you hear of beheading, do you assume that Islam is involved? Beheading is an integral part of Islam. Mohammed repeatedly ordered people beheaded and the Koran even includes beheading. Beheading is threatened to settle arguments about Islam. Men were threatened with beheading if they did not become a Muslim. Beheading is mentioned nine times in the Hadith of Bukhari, once in the Koran and 41 times in the Sira. Beheading is recommended and common in the doctrine of Islam.
American and British humanitarian aid workers were beheaded by the Islamic State in Syria: