But...why should they have to?
They were born where they were born; they have as much right to thrive within those communities as anyone else--to be able to express and relish their unique heritages without being forced away. Their roots go just as deep as anyone else's...why should arseholes be allowed to win by making them feel like they have to run?
They should have the right and means to defend themselves without picking up and scattering. Otherwise nobody else gets to know anyone else; everyone's just kept as this strange, distant 'other.' To understand others, you have to empathise with others; that can only happen by getting to know people.