The Jews did not fight because it was not in their culture to fight.
It's not a question of culture. Throughout most of Jewish history in Europe choosing not to fight was a rational, if painful, decision, given that Jews were a tiny and persecuted minority with NO civil rights, prohibited from owning land or engaging in most trades. There were exceptions, two that I know about had in common that the Jews made common cause with the non-Jews in their city, against outside aggressors. In both cases, the non-Jews then made side deals with the outsiders allowing them to kill the Jews but were subsequently themselves slaughtered by the outsiders:
1. 1000 Jews of Tulchin (Tulczyn), Poland, along with local Poles, were tortured and massacred by Cossacks, 1648. An agreement between the 2,000 Jews and 600 Christians of Tulczyn to defend their town at all costs succeeded in preventing the Cossacks from capturing it. Kryvonos, the Cossack leader, contacted the local governor and offered to leave the Poles alone if he handed over the Jews. The Jews found out about the plan and only through the intervention of their leader Rabbi Aharon (who feared reprisals) persuaded them not to kill the local leaders. Instead, Rabbi Aharon convinced the governor to take a high ransom and give it to the Cossacks. Kryvonos accepted the ransom, entered the town, killed a large number of the Jews and then killed the Poles for betraying the Jews.
2. The Haidamak (the paramilitary bands) Massacres in the Ukraine, 1768. The peasant serfs and Cossacks rioted much in the same vein as Chmielnicki 120 years earlier. At Uman, the Poles and Jews defended the city together under the Polish commander, Ivan Gonta. The next day, convinced by the Polish revolutionary Zheleznyak that only the Jews would be attacked, Gonta allowed the fortified city to be entered without a fight. Approximately 8,000 Jews were killed, many of them trying to defend themselves near the synagogue. As soon as the Jews were all massacred, the Haidamaks began to kill the Poles. Although they killed about 20,000 Jews altogether, the Haidamaks were Ukrainian nationalists who are still celebrated in folklore and literature.