I think the article is misleading.
Thomas's own writings describe how the situation changed over time, how appeals to deference have grown bolder than expected, so given that new evidence, he's been clear that he thinks the new environment is off-course.
In a way it's not that he changed his mind on an issue, but that the legal system changed, leaving him feeling the need to address the new ways that the federal government is functioning.
There's nothing scandalous about that.
@volkris You often come to the defense of really bad people. Please don't do that in my timeline. Blocking.