To prove racial gerrymandering, a plaintiff has to draw race-blind districts that are just as favorable to Republicans. But that's impossible to do because Republicans uniformly select racists as their candidates and Black voters won't vote for racists. So racial gerrymandering is always allowed.
BREAKING: In an unsigned, per curiam opinion on the shadow docket, the SCOTUS conservatives allow Alabama to use a congressional map held repeatedly by a lower court to have been enacted with discriminatory intent.