The idea of "dark ages" is a myth (pun with the username intended), but if anything it applies to the early medieval age, which is exactly when anti-Jewish sent

The idea of "dark ages" is a myth (pun with the username intended), but if anything it applies to the early medieval age, which is exactly when anti-Jewish sentiment in Europe was... not very common, since persecution of Jews started later: https://en.wikipedia.org/wiki/Medieval_antisemitism https://en.wikipedia.org/wiki/Medieval_antisemitism