 Complete the following phrase:  In 1775, Ahmed el-Jazzar the Butcher brought peace to the region with an iron fist. In 1780, many Polish Jews settled in the town. During the 18th and 19th centuries it received an influx of rabbis who re-established it as a center for Jewish learning. An essay written by Rabbi Joseph Schwarz in 1850 noted that Tiberias Jews suffered the least during an Arab rebellion which took place in 1834. Around 600 people, including nearly 500 Jews, died when the town was devastated by the 