I'm sorry, this is absurd.
Democrats do not respect the Black vote because they don't have to -- Black Americans vote blue no matter who. The *most* Black voters ever get are rhetorical gestures like promises to pass the George Floyd Act (which never happened) or Junteenth (hooray).
By contrast, Latinos are swing voters & consequently will be courted. Moreover, NV is a winnable state for Dems -- SC is not -- so it makes sense to prioritize it. The only reason Dems pretend SC matters during primary season is to discipline left candidates like Bernie who fare poorly there.
The scramble to keep SC as the first state to vote in the primary is 100% about SC local politicians trying to preserve their newfound endorsement power & influence. It bears no relationship to the interests of Black Americans in SC or anywhere else.
"Everything we do before a pandemic will seem alarmist. Everything we do after will seem inadequate." - Michael Leavitt, former HHS Secretary under President George W. Bush