One of the barons' demands of Henry was that he write off the Jewish debts. This he would not do: Henry used occasional tallages (taxes) on the Jews to fund his own endeavors. His healthy balance sheet needed Jews to be able to collect what was owed them so that he could access take it.
In April of 1264, Montfort encouraged his followers and others to begin widespread persecution and even execution of the Jews, destroying their records of debt. One of the main centers of the Jewish population in England was in Canterbury, where about 20 Jewish households accounted for about 100 or so Jews. There had been, in fact, a widespread persecution of the Jews a couple years earlier, when lay and clerical citizens attacked and burned some of their houses, although no one was killed that time.
A member of Montfort's rebellion, the brutal Gilbert de Clare, occupied Canterbury and instigated "The Massacre of the Jews." An unknown number of Jews were killed and their property looted, and several Jewish women were forcibly baptized. Any remaining Jews fled Canterbury. The most prominent member of the Canterbury Jewry was Solomon, son of Josce. When he returned in 1265 (he fled abroad during the troubles), Henry III returned his property to him.
Montfort's son Henry and the 6th Earl of Derby, Robert Ferrers, led a pogrom that killed all the Jews in Worcester. Montfort's son Simon led the attacks in Winchester. In London, a chief Montfort supporter, John Fitz John, led the attacks and is said to have killed two of the leading Jewish figures with his bare hands; a total of 500 Jews in London were killed. In 1264 and 1265, attacks were made in Lincoln and Cambridge, and financial records were destroyed.
Anti-Jewish sentiment was always bubbling just under the surface, looking for a reason to burst forth and lead to atrocities. There were often single incidents that were blamed on the Jews. Even if that blame was proven false, the ill feeling left its mark and was ready to be invoked to justify later attacks. One such that stayed in the public consciousness and could not be expunged was the story of little Saint Hugh of Lincoln, which I will share with you tomorrow.