Complex sentence: The Syrian Jewish communities of the United States is a collection of Jewish peoples who trace their roots to the beginning of the 20th century, the majority of them now living in Brooklyn, New York, Deal, New Jersey and Miami, Florida.
Split into simpler sentences: The Syrian Jewish communities of the United States are a collection of communities of Syrian Jews in the United States, mostly founded at the beginning of the 20th century. The largest are in Brooklyn, New York, Deal, New Jersey and Miami, Florida.