To the contrary. The Jews are blamed for the plague. Some claim it's heavenly wrath against Christian Europe for tolerating the non-believers. Others claim that Jewish prayers poisoned the drinking water. Society breaks down in the midst of the carrion.
Parents abandon their children, priests stay away, charity is dead.
Bands of roaming zealots massacre much of the Jewish population. Frankfurt Germany has nineteen-thousand Jews prior to the plague. By the end of the fourteenth century there is barely a minyon of ten Jews left. Sharing and caring on behalf of Torah Judaism. Preserving a near-lost legacy and heritage.