The number and tone of the comments here (BV: GOP Becoming An All White Party) demonstrate the truth of the author's point.
What will happen when the only statewide elections that an all white party can win are 5 or 6 Neo-Confederate states?
In places like Kansas, Ohio and Colorado, this sort of white resentment just isn't going to fly anymore. We're seeing it already, with the open revolution against Brownback and John Kasich endorsing the ACA.
Why assume the GOP will remain and be reformed? I think it is far more likely to go the way of the Whigs.