Nogs arent that smart, their women are simply insufferable and the state locks them up for beating them (not that blacks care, since the only punishments they understand involve death and dismemberment).
I dont think nogs think in terms of racial conquest of breeding other races women, especially when even a nog is smart enough to realize that race-mixing kills your own race too. I think blacks are actually fairly opposed to race mixing themselves on that principle. The entire push of white women to mix with black men comes from jews, though ironically I think they drank their own poison because a disproportionate number of "white" women with black women are jewesses.
White women are the only race of women who are dumb enough to date someone of an inferior race.
But they never stay, because our cultures are incompatible. No black man is going to be able to endure a white woman long term.