evidence seem less conclusive on the destruction of Christian churches and monasteries in Jerusalem. According to the later account of Strategius, whose perspective appears to be that of a Byzantine Greek and shows an antipathy towards the Jews, thousands of Christians were massacred during the conquest of the city. Estimates based on varying copies of Strategos's manuscripts range from 4,518 to 66,509 killed. Strategos wrote that the Jews offered to help them escape death if they "become Jews and deny Christ", and the Christian captives refused. In anger the Jews allegedly purchased Christians to kill them. In 1989, a mass burial grave at Mamilla cave was discovered in by Israeli archeologist Ronny Reich, near the site where Strategius recorded the massacre took place. The human remains were in poor condition containing a minimum of 526 individuals. From the many excavations carried out in the Galilee, it is clear that all churches had been destroyed during the period between the Persian invasion and the Arab conquest in 637. The church at Shave Ziyyon was destroyed and burnt in 614. Similar fate befell churches at Evron, Nahariya, 'Arabe and monastery of Shelomi. The monastery at Kursi was damaged in the invasion. Pre-Islamic Arabia In AD 516, tribal unrest broke out in Yemen and several tribal elites fought for power. One of those elites was Joseph Dhu Nuwas or "Yousef Asa'ar", a Jewish king of the Himyarite Kingdom who is mentioned in ancient south Arabian inscriptions. Syriac and Byzantine Greek sources claim that he fought his war because Christians in Yemen refused to renounce Christianity. In 2009, a documentary that aired on the BBC defended the claim that the villagers had been offered the choice between conversion to Judaism or death and 20,000 Christians were then massacred by stating that "The production team spoke to many historians over a period of 18 months, among them Nigel Groom, who was our consultant, and Professor Abdul Rahman Al-Ansary, a former professor of archaeology at the King Saud University in Riyadh." Inscriptions documented by Yousef himself show the great pride that he expressed after killing more than 22,000 Christians in Zafar and Najran. Historian Glen Bowersock described this massacre as a "savage pogrom that the Jewish king of the Arabs launched against the Christians in the city of Najran. The king himself reported in excruciating detail to his Arab and Persian allies about the massacres that