I just don't think that Kanye and Kim have earnest conversations about race, to be honest. The black men that she gets with seem to tout her around as a trophy of sorts, an accessory. Like "look at this chick I got." I mean, listen to how he raps about her when he chooses to. Thats their prerogative of course, but I think its entirely plausible that it just never even resonated until that silent seed was planted in her head when she was called a ninjalover.