The Jews, first published in reprinted five years
Later, then reprinted in 1937 with a new introductory chapter (in a different, smaller, face, numbered with Roman numerals) , and Zionism and the Arab Revolt. This book has ensured Belloc has been censored, like his contemporary McCabe. To take some random examples: Louis Golding in The Jewish Problem (1938, Penguin) makes no mention of all datasets Belloc, though he must have known of him. An American Catholic book by Charles McFadden, The Philosophy of Communism (1939; reprinted 1963) omits him. Warrant for Genocide (Norman Cohn) omits him, as he omits Iustinus Pranaitis, though these deserve a place in ‘myth of the Jewish World Conspiracy’. Biographies of other literary figures down to the present day, when they discuss Belloc, omit this book. Poor Belloc is even censored by Catholics: on online version of The Great Heresies (1938) has chapter 2 omitted, though this is slightly concealed by omission of the chapter numbers in the contents. I would guess it contained praise of the ‘strong new movements’ in Italy and Germany.

The Jews is interesting for several reasons:
Belloc’s religious views make him take rival religions seriously. Note that he didn’t regard Russia as Catholic: it was a ‘vast sea of Orthodox culture.’ He is objective enough not to believe only in religious blocs: he firmly believes in patriotic nationalisms (though this seems at odds with Catholic theory). (And he generally takes the side of France against Germany or Prussia). In fact he became a supporter of the ‘strong and healthy movements’, i.e. Fascism, in Italy and Spain, though not of the odd racist people in Berlin.
Belloc suppresses, or doesn’t know of, the Khazar idea
Maybe because of the official belief that modern Jews have Biblical connections. Surprisingly, Belloc says nothing whatsoever of actual Jewish beliefs! Perhaps he couldn’t bring himself to read up on the subject.
Belloc lists dislikeable characteristics which he attributes to Jews. These include secrecy (but what about the Vatican?) and money-making as a soul-destroying activity, and the Jewish tendency to monopoly (and yet one can’t help recalling that, for example, the Pope gave exclusive rights of exploitation to Spain and Portugal).