>>19728383Basically it comes down to degredation. These people who post in these threads are closest if not outright racists. They see being "blacked" as humiliating or degrading in someway.
Due to a life of rejection or bullying by women they cope by wanting to see the women be bought down to their level.
Failing this they can also resort to the trope of the girl being tainted so this becoming beneath them. It's not much but it's a small self esteem boost