Roberts doesn’t even square his disapproval of korematsu with his disapproval of korematsu.
Korematsu specifically disavowed the thing Roberts said was korematsu’s holding when he disavowed it.
John Roberts is a perfect example of what I call the Ludwig Kaas principle — that a cynical ally of fascists is worse and more morally culpable than a true-believing fascist, because the true believer can snap out of it with a moral epiphany but the cynic is doing evil by his own lights.