Occam's Razor...blacks expect to get things from the Dems that they feel they won't get from Republicans. I would think many blacks, even blacks with good paying jobs, believe that without special victim status their whole privileged world will collapse.
In that they are probably right. Many blacks with good paying jobs or status jobs were simply given them or given so many extra hiring points for being the right color.
They, blacks, think this is fair even though they usually come out on the bottom when tested against other groups. They do not want to have compete fairly with other groups. They know things would be a lot different if they were held to the standards of other Americans.
So it's not too difficult to understand.....blacks want to keep on being privileged victims. They don't want the gravy train to end. They want to keep on in their belief that they are owed forever because of slavery and segregation.
White liberals are more than happy to grant them that status in perpetuity to get their votes. Not too hard to figure out.