Thanks for the pointer about Jews and basketball. There's a good movie to be made about Holman or a character like him.
1. This is all I find with a quick search: https://www.urbandictionary.com/define.php?term=Jewish%20Navy
2. This doesn't seem to have anything to do with Jewishness: https://www.jstor.org/stable/42892138
3. This suggests Cincinnati was simply the first place in the region where Jews settled, so a community grew up there: https://en.wikipedia.org/wiki/History_of_the_Jews_in_Cincinnati
I've written elsewhere about the first wave of Jews being heavily Sephardic, unlike the second. None of that has anything to do with the fact that Jews have always enjoyed the legal privileges of whiteness in the US, even though they've faced prejudice just as Catholics and Mormons have.