Omo, you are so on point!!! You see, the genesis of that attitude in us blacks dates way back to the earliest days of man, from my personal and indept research of the root of this mindset in the black man [I wouldn't want to go into all that here]. I mean that attitude that makes the blackman feel insecure in his black skin, that makes him see the black skin as a reproach of some sort, so much so that he tries to interbreed with [especially] the white race in an attempt to expunge his descendants from that perceived curse of being born with a dark skin.
Even in our naija society, right from childhood, little kids get messages from all around them that instils that satanic idea of 'the lighter the better' in them. We associate everything black with being bad or evil. It's this same mindset that pushes some who already have self-esteem issues, to go as far as bleaching their skins just to meet society's standards of beauty. And even amongst the black/african american population in america, racial integration and intermarriage has introduced new set of problems within that community coz the light-skinned products of white and black parents/marriages who live in a society dominated by white ppl, at some point, begin to get the false idea that their lightness sort of confers on them a higher and superior status in the scheme of things in relation to their darker-skinned brothers/sisters. And in turn, the darker skinned ones resent the lighter-skinned ones as a result of perceived marginalization on account of their darker skins.
History makes it clear that since earliest times, the black race has always had fair-skinned strains; in other words, at some point in time, naturally fairer skinned strains emerged from the darker-skinned stock. Not as a result of any artificial racial inter-breeding, but rather as a result of [super?]natural processes. Hence why some africans are darker than the others [the Ethiopians and Somalis have curly hairs, for example, and the Ibos and even some yorubas also have some naturally fair-skinned strains. While the Akans and Ashantis of Ghana are known to be usually very dark-skinned, the Fantes and Ewes tend to be lighter, e.t.c]. These sort of varied strains within the black racial family came about naturally.
The problem starts when, for whatever reason, either or both strains within this racial family start looking down on the other and accusing each other of either not being black enough or being too dark.
Personally, I don't date white females -- that's just not my preference. I love my black women, especially naija women

[the same way I'm sure the average white man would prefer to be with a white woman that he shares atleast that racial commonality with].