“...The killer is half-Chinese and half either White or Jewish,...”
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Do you understand that “Jewish” is a religion and not a race? The great majority of Jews are “white”.
Technically, a Jew is a descendant of Abraham, and a family group. And a tiny one at that. Unless you convert of course.
Jews are an ethnic group as well as a religion. Most ethnic Jews that I have known are non-religious, and ethnically distinct from slavs, Germans, etc.