no.
it's disingenuous.
if you want to beat trump, south carolina offers you nothing of any value. the reason is twofold. first, the democrats have no chance of swinging the state. second, the party can take at least 90% of the black vote for granted.
if you want to beat trump, you need to focus on states you can actually win, like nevada, iowa, new hampshire, wisconsin, michigan, pennsylvania...
...and winning those states means the party needs to perform better with white voters.
so, you need to make that choice: do you want to win or not? campaigning against white supremacism in south carolina is just tilting at windmills.