Ethnaphobia
A form of racism which involves the fear and/or hate of nations and peoples that are from one united culture and heritage, especially from their own native Indigenous homelands. And/or the fear of people with native heritage uniting within their own native homelands.
E.g. #1: Leave those native peoples alone! they have a homeland for their own people and culture, Ethnaphobe!

E.g. #2: Bill: David why are you afraid of going to (Insert country here) ? David: They all have the same culture and unity, I hate them, I will stick out like a sore thumb. Bill: you might be struggling with ethnaphobia David.

E.g. #3: One can be a Xenophobe and a Ethnaphobe. For example: an American fearing outsiders, simultaneously, hating the native American Indigenous peoples. Or the fear of people with native heritage uniting within their own native homelands.

E.g. #4: Ethnaphobes are people that hate other peoples native cultures and heritage. Possibly hate the entire worlds diverse cultures and peoples.