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In page Blood libel:
"The blood libels emerged at a time when the church and particularly the Crusades were driving increasingly anti-Judaic discourses. These were later reinforced through the Church council Lateran IV which mandated the segregation of Christian and Jewish society, and built an apparatus of enforcement across Europe.[citation needed] At a local context, many of the English examples may have included an element of church competition for saintly cults, with the income that veneration produced.[citation needed]