Does anyone know how common Jewish symbolic jewelry (specifically Star of David) was in 1912? Would it have been anachronistic for the Jewish passengers to wear one publicly? How blatant was antisemitism in 1912? Small detail I wanted to share for other Titanic novel authors--there was a kosher kitchen aboard!!
Source--https://www.nwaonline.com/news/2021/aug/29/titanic-connections-branson-museum-honors-jewish/
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Investigations located the kosher kitchen -- near the Third Class galley on F deck -- and revealed that the chef slept just off the Third Class dining hall, sharing a room with four Second Class cooks, three Third Class cooks, one Scandinavian interpreter and two other crew members.

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A White Star Line example of the Third Class Bill of Fare includes a statement that "Kosher meat" would be supplied and cooked for Jewish passengers as desired, according to "The Jews of the Titanic," written by Eli Moskowitz and published in March 2018 by Strauss Consultants of New York City. By 1912, Kellogg says, "it was normal for passenger ships to have kosher food aboard for their Jewish passengers."

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"We even know what the dishes would have looked like, thanks to dishes that came from (Titanic' sister ship) the Olympic at a slighter later period," Kellogg says in the exhibition notes. But "as of right now, no Hebrew-marked or kosher service dinnerware/china/stoneware has been pulled from the Titanic wreck or the debris field."

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Also revealed by the research were the number of Jewish passengers on board -- 31 in First Class; 13 in Second Class; 23 in Third Class; and two crew members. Of those passengers, 17 from First Class survived, three from Second Class and 10 from Third Class; both crew members died. The number is slightly different from Moskowitz's book because ongoing research revealed that some were assumed Jewish and were not, Kellogg explains.