What is Adolf Hitler referring to when he says "certain events which happened in the middle ages" in this passage from Mein Kampf? | AskHistorians Archive Observer

What is Adolf Hitler referring to when he says "certain events which happened in the middle ages" in this passage from Mein Kampf?

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ModerateMandarin

He's likely referring to the various pogroms and expulsions of Jews in the HRE