The arc of history is usually this: minorities are viciously attacked when they still represent some political power and are seen as a threat by the majority, a

The arc of history is usually this: minorities are viciously attacked when they still represent some political power and are seen as a threat by the majority, and they are cherished and afforded the rights and considerations you mention when they have almost disappeared and have become a harmless item of nostalgia and exotic charm. You can see this dynamic play out across all cultures. EDIT: some wording.