Why were religious minorities in Europe persecuted during the crusades?

Europe grew economically because of the Crusades. New markets in the east opened to European traders. Luxury goods were brought to Europe, like silks, spices, and medicine.Explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.