Well, to make a long story short, John Paulson is Jewish!
Since John Paulson's mother is Jewish, and in Judaism one's religion is based on one's mother's religion, then that makes him also Jewish. His father is not Jewish.
John Paulson (whose full birth name is John Alfred Paulson) was born on December 14, 1955 in New York City, New York.
John's mother was the daughter of Jewish immigrants from Lithuania and Romania who had moved to New York City.
His prominence and fortune were made in 2007 when he earned almost 4 billion dollars by using credit default swaps to effectively bet against the U.S. subprime mortgage lending market.
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