But everyone having a common ancestor doesn't change that White people should be allowed a homeland for themselves

Agreed, however blacks have 20% DNA from an unknown hominid not found in Caucasoid DNA. Out of Africa is also wrong. Whites are most likely descended from a very small group that survived global flooding (mostly likely on a larder boat like the ark) 6-10k years ago. Blacks are either from a particular voyager on that ark with different genetics (Ham) or hominids that survived the flood coincidentally (in caves, floating islands, pockets spared the flooding, etc).

That vast differences between whites and blacks are not very likely created by evolution over such short times. (Although environment does play some role).

If it were unequivocally proven that blacks had the exact same genetic orgins as whites whites would still have the right to freedom of association and ethnostates as they have formed different cultures and genetic expressions than blacks since the common ancestor event. (even though I deny the claim)