for al-Darzi's disputing Hamza's role as the leader of their movement, as well as for his followers' over-zealous, extremist and provocative actions, which revealed the movement's ideas prematurely and placed it under danger of attack. The Day of According to Yahya of Antioch, the chief opponent of the doctrines propagated by Hamza and al-Darzi was the leader of the established Isma'ili , the Turkish chief missionary (), Qut Tegin. Indeed, the Turkish (slave soldiers) of the Fatimid army appear to have been generally opposed to the new teachings. During this time, the followers of the rival leaders engaged in regular brawls in the streets of Cairo, cursing one another as infidels. The conflict between the two parties came to a head at the Mosque of Amr at Fustat (Old Cairo) on 19 June 1019 (12 Ṣafar 410 AH), known in Druze tradition as the "Day of ", a name whose meaning is unknown. On that day, some of Hamza's followers entered the Mosque of Amr, loudly proclaiming their beliefs, but encountered the opposition of the locals, who began streaming to the mosque. When the Sunni chief judge () learned of events, he went to the mosque, where Hamza's men tried to have him read out a statement affirming the divinity of al-Hakim. The demurred, and the assembled multitude became incensed, so that they lynched Hamza's followers, dragging their corpses through the city's streets. On the same day, al-Hakim dismissed the police prefects of the capital, and punished the instigators of the lynchings. This only served to provoke the populace and the troops: on 29 June, the Turkish soldiers surrounded al-Darzi's house and, after a brief battle with his followers who had barricaded themselves there, stormed it. Some forty of al-Darzi's supporters were killed, but al-Darzi himself managed to escape and found refuge in the caliphal palace. The Turks then assembled before the palace gates, demanding that he be delivered to them for punishment; the historical sources are silent on al-Darzi's fate, but Hamza's epistles report that he was executed by al-Hakim. Robbed of their original target, the Turkish troops turned on Hamza and his followers, attacking the Raydan Mosque and setting its gate on fire. Hamza himself reports in two of his epistles (10 and 19) how, with only twelve followers, of whom five were either too old or too young to fight, he managed to hold back the attacks