The actual reason is because asian success forces black americans to face the reality that their failure is not because the white man is holding them down, but that their culture is garbage.
Funnily enough, essentially the major reason blacks went after the Korean business owners in the 1992 LA riots
Out of the $850 million worth of damage done in L.A., half of it was on Korean-owned businesses because most of Koreatown was looted and destroyed.[104] The effects of the riots, which displaced Korean Americans and destroyed their sources of income, and the little aid given to those who suffered, still affected LA-based Koreans in 2017, as they struggled with economic hardship created by the riots.
Funnily enough, essentially the major reason blacks went after the Korean business owners in the 1992 LA riots
edit: surprised wikipedia hasn't erased this yet:
Exactly.
What did the Koreans ever do to black Americans or their ancestors? Nothing.
But that was who the mob focused on destroying, because that was who made them the most angry.