So this is a surprise? Listen, first of all the US constitution has been dead since the days of Lincoln.
Secondly, let's say the USC was still in effect ; if anyone who studied the USC had read Roberts previous opinions, that someone would have known Roberts was not someone to trust in upholding the USC. People, the justices are POLITICAL appointees, not enlightened beings who have through some mystical process to purify their souls.
Thirdly, until (not that I believe it'll happen), until so-called conservatives actually bother to be concerned with liberty, and also actually bother to study the USC, then they will continue to support .