That let me think about the periods in which various religions have promoted Jew hate. I have argued that Jew hate requires an elite hereditary hierarchy which uses Jew hate in order to protect itself. Hereditary hierarchies use the Jews as a scapegoat.
That explanation of hereditary hieracrhy is not sufficient because we have the example of Islam that was not seriously anti-Jew for a long time. Islam became strongly anti-Jew when the Ottoman-Turk Empire faced collapse and Islam began losing wars to the new Jewish state.
Neither India, China or Japan have experienced any national Jew hate even though they have hereditary hierarchies. That suggests that hereditary hierarchy alone is not sufficient to create Jew hate. What is also required is a religion that is not expanding. A zero sum religious environment.
Christianity has been on the wain in Europe for several centuries but not in the U.S. which also got rid of its hereditary hierarchy. Which explains the re-appearnce of Jew hate in Europe and its near total absence in the U.S.
Neither China nor Japan have a religion so that is not an issue in combining with an hereditary hierarchy to create Jew hate. India has several religions but the national religion is Hinduism. Hinduism is not a religion by the conventional definition. It is a national story. The Hindu national story doesn't confront expansion or retreat and is therefore not a fertile ground to combine with the hereditary elite to form an anti-Jew sentiment.
In Africa the story is similar to China and Japan, with no religion in most parts of the country.
In brief, we get Jew hate where Jews can be the scape goat for a hereditary hierarchy (usually hereditary hierarchies are unpopular) and a contracting national religion.