The Hebrew prophets were perpetually protesting against the Hebrew race relapsing into an idolatry that involved such a war upon children; and it is probable enough that this abominable apostasy from the God of Israel has occasionally appeared in Israel since, in the form of what is called ritual murder; not of course by any representative of the religion of Judaism, but by individual and irresponsible diabolists who did happen to be Jews.
Or possibly it’s an anti Semitic canard with no basis whatever in reality. Amazing what could be said in the 1920s!