The Jews of Spain

[15th century Spain was] "...A country populated by native-born Catholics, but dominated by newly-converted Jews (their motives often pure opportunism) who had infiltrated every position of influence or authority...the bulk of the population (those who held by the Old Faith) were ground down as a result of the conversos' triumphant prosperity, and had little or no money to spare."

-Clemente Fusero, The Borgias
pp. 130