Hes a vile man. William F. Buckley actually wrote the definitive work about Buchanans anti-Semitism. He compares Buchanan and Joe Sobran, and concludes that Sobran is psychologically obsessed with Jews, and also hates Israel, but is not technically an anti-Semite, but Buchanan is.I read Buckley's essay, and as best I can recall it concluded BJP was guilty of nothing more than insensitivity.
Sobran's case, Buckley apparently concluded, was different and Buckley kicked him off the NR staff.
I think this is the book of which you speak:
Here is one of the Editorial Reviews ( via Amazon ):
From Publishers Weekly This volume reprints Buckley's lengthy, genteel, circuitous National Review essay,
in which he reached the pained conclusion that his fellow conservative Patrick Buchanan, the reactionary former presidential candidate, is anti-Semitic .
In the same piece, Buckley levels charges of anti-Semitism at his friend and fellow conservative, syndicated columnist Joseph Sobran, and at left-liberal Gore Vidal, who asserted in a Nation article that American Jews have twin loyalties. Further, Buckley exonerates of charges of anti-Semitism the Dartmouth Review, which in a 1988 article compared Dartmouth's Jewish president, James Freedman, to Adolf Hitler, and which once ran a Nazi slogan on its masthead. Also included is Sobran's indignant, defiant rebuttal, as well as letters to the National Review, praising or condemning Buckley's essay, by Norman Podhoretz, Irving Kristol, A. M. Rosenthal, Robert Novak and others. Buckley's rejoinders to the letters and an afterword round out this colloquy.