What were they seeking to do? Count every black's vote twice?
I *think* they are trying to put about 40% of a minority in a district knowing that at least 10% of the non-minority will vote for the Rat. But the law says that in order to make a district that gerrymanders outside of standard gerrymandering that it must have at least 50% of the minority in that district.
So if you really want to screw over a minority you put 100% minority in one district. This will ensure they have a minority congresscritter, but it also waters down their vote in the entire state as they are all located in a single district. If they broke this district up and combined it into 3 other districts giving each district 33% more minority votes...it means they are likely to get 3 minority candidates (or so they believe). But keep in mind to the rat minority = democrat candidate (even if he is white).