Section 2. The Congress shall have the power to enforce this article by appropriate legislation."
This amendment, as written, does nothing to speak about Congressional representation, district construction, or the like. It only guarantees that you have a right to cast a vote.
Last time I checked, if your constituency is out-numbered in an election setting by a 3-to-1 margin, you lose... every single time. Alabama Democrats should therefore be happy that they've been granted 1 Congressional district written in for them.
The argument by the Alabama legislature, therefore, should be that their maps are all about political purposes, not racial purposes. Politicial divisions are allowed... and they can certainly cite the districts of other (Blue) states to back that up.
Furthermore, the drawing of any district to favor a particular group based on race -- which is what this judge is demanding -- runs directly afoul of the very same 15th amendment he's allegedly upholding in this ruling.
I just read the text of the Voting Rights Act of 1965. It’s all about ensuring the right to vote for nonwhite citizens—no literacy tests, no poll taxes, no intimidation, etc. I didn’t see anything about guaranteeing that nonwhite citizens get the winning candidate of their choice but maybe it’s hidden in the legalese.