Thomas wasn't part of the majority? He wrote a concurring opinion - he agrees with the main decision and went out of his way to further explain his thoughts, including that he disagrees with any of the rights created under the auspices of due process. But, he conveniently left Loving v Virginia off the list, which was also decided (partially) on due process grounds - I guess he's not quite so sure about his principles that he'd blow up his own marriage.