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This includes any people who aren't entirely of Jewish descent, such as they are mixed with other ethnicities, as long as they identify as having Jewish ancestry and Jewish last names are rather popular, along with at maximum a holiday similar to St. Patrick's day, but for Jews. I would also be curious if a holiday from a large Jewish population could develop in the US, similar to Halloween, which has Celtic origins. The holiday could be as Americanized as possible, as long as it has explicitly Jewish Roots.( Christmas doesn't count for Jewish Roots). But, mainly I am asking if a Jewish American population could reach the size and effect of the Irish American population( with lots of people claiming Jewish descent , similar to how lots of people claim Irish descent in OTL USA).