Chronological dating techniques
The Jewish motive, where it acts, typically in the media and the academic world, seems partly to skirt around the absurdity of their claiming to be chosen by 'G-d', partly because non-Jews are regarded as worthless, partly to ascribe the tale of Ham, Shem, and Japheth to 'G-d', and partly to pretend that non-white immigration is valuable rather than damaging.
Roger Pearson's Heredity and Humanity (1996) discusses the entire heredity question without mentioning Jews once; they are not even in the index, although anyone serious can identify them, for example 'Ashley Montagu'.
Most people, reasonably enough, aren't much interested in politics and wars and religions, and prefer to have something to do that they like, and somewhere nice to live with people they like.
So why burden them with yet more warnings, and information about a ridiculous bunch of obsolescent fanatics?
In particular, 'Jews' are a sub-race produced by the written word.
Without the effects of reading and writing, 'Jews' could probably never have existed. There are other technical possibilities, for the future: here's an interesting comment: It will be interesting when face-recognition software ... members of cryptic in-groups [and races].' Jewish control of media has suppressed popular discussion of all this; 'politically correct' writers such as Richard Dawkins go to great lengths to avoid any mention of important human racial differences.