The source, published by Phys.org, is a work of cultural history rather than experimental science. It uses the Feast of San Gennaro in New York's Little Italy as a narrative device to explore how Italian immigrants assimilated into American life.
According to the article, the festival's popularity—evident in the crowds that make "everyone want to be Italian" each September—reflects a broader story of immigrant integration. The headline states plainly that the feast's story is the story of how Italian immigrants became American.
For a Science section, this is best understood as a contribution to social history or cultural anthropology, offering qualitative interpretation rather than quantitative findings. No scientific claims, data, or methods are presented in the source.