the First Crusade

Jewish reactions

News of the attacks spread quickly and reached the Jewish communities in and around Jerusalem long before the crusaders themselves arrived. However, Jews were not systematically killed in Jerusalem, despite being caught up in the general indiscriminate violence caused by the crusaders once they reached the city.

The Hebrew chronicles portray the Rhineland Jews as martyrs who willingly sacrificed themselves in order to honour God and to preserve their own honour. Faced with conversion or death, they usually chose death. On numerous occasions, the chronicles mention a prominent Jew who expresses a willingness to convert, only to speak out against Christ and Christianity when a crowd has gathered for the baptism, mocking Jesus as a product of "lust" and "menstruation"; a swift death followed. The chronicles curse Count Emicho whenever he is mentioned ("may his bones be ground into dust"), and compare the Pope to Satan.

Sigebert of Gembloux wrote that most of those Jews who converted before the crusader threat later returned to Judaism.[3]

In the years following the crusade, the Jewish communities were faced with troubling questions about murder and suicide, which were normally sins for Jews just as they were for Christians. The Rhineland Jews looked to historical precedents since Biblical times to justify their actions: the honourable suicide of Saul, the Maccabees revolt against Antiochus IV Epiphanes, the suicide pact at Masada, and the Bar Kochba revolt were seen as justifiable deaths in the face of a stronger enemy.

Previous to the Crusades, the Jews were divided among three major areas which were largely independent of one another. These were the Jews living in Islamic nations (still the majority), those in the Byzantine empire and those in the Roman Catholic West. With the persecutions that began around 1096, a new awareness of the entire people took hold across all of these groups, reuniting the three separate strands.[2]

http://en.wikipedia.org/wiki/Persecution_of_Jews_in_the_First_Crusade