I personally have never grown up with any black person that hated East Asians. There is a lot of unfortunate prejudice within that group dynamic. I can't say what started it, but I'd say it was more MSM propaganda that pushed the disdain- as usual.

Edit: I assume most of these people have been influenced by something/someone. Just to keep the pot stirring and all of us at each other. Anything but pointing the finger at the swamp.