Probably none because you don't have a chance of pulling out a green sock from a dresser full of red and blue socks.
Catholic society - a lot of the subjects for his work came from parables. Realism in this society was coveted in the arts - his realism in his bronze statue of David for the Medici is overtly realistic, he emphasised the key parts.
Some Christians viewed Jews as enemies of Christianity is your best answer.
As in the bible, it states that it was the Jews that wanted Jesus (whom the Christians believed to be the son of God) to be crucified, and so in return, the crusaders began to slaughter most of them. This was inexcusable, and led to the Church having to provide established order and justice.
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