Christian rulers gradually saw the advantage of having such a class of people who could supply capital for their use without being liable to excommunication .
As Catholics were forbidden by the church to loan money for interest , some Jews became prominent moneylenders .
Christian rulers gradually saw the advantage of having such a class of people who could supply capital for Jews ' use without being liable to excommunication .
As Catholics were forbidden by the church to loan money for interest , some Jews became prominent moneylenders .