Will Non-Black people be scared of Black people if the world is overpopulated by Black people?

Africa is supposed to reached 4 billion Africans, while there was this source that says, “the African-American population will doubled every 50 years”, but now I can’t find the year. By year 2100, 130mil African-Americans, 2150 260mil African-Americans, 2200 520mil African-Americans, and by year 2250 1.04bil African-Americans, and so on.

Will Non-Black people be scared of Black people if the world is overpopulated by Black people?
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