Speaking of Ramsay MacDonald, recently I was reading his Wikipedia page and I stopped on this quote from his book
A Socialist In Palestine, an account of his visit there from 1922.
The other section is composed of the rich plutocratic Jew, who is the true economic materialist. He is the person whose views upon life make one anti-Semitic. He has no country, no kindred. Whether as a sweater or a financier, he is an exploiter of everything he can squeeze. He is behind every evil that Governments do, and his political authority, always exercised in the dark, is greater than that of Parliamentary majorities. He has the keenest of brains and the bluntest of consciences. He detests Zionism because it revives the idealism of his race, and has political implications which threaten his economic interests.
That a Labour leader in that time would view Zionism positively as a Socialist project is not surprising, but the contrast with this awfully detailed version of the "rootless cosmopolitan" caricature sounds almost surreal. The past is truly a foreign country.