[Girlene]

What’s the significance of the dissent being unsigned?

Not exactly sure....it was emphasized in Jan Crawford's piece. My guess is this. Dissent opinions are authored by a judge. Others can sign on or agree. Since this dissent was authored by all four, I'm assuming that's why it was unsigned. All four agreed and were in unison with the dissent. Purely guessing at this point.

[RightFighter]

The dissent is unsigned because Roberts wrote it - it was originally to be his majority opinion. When he switched sides, the conservatives left most of it in place and didn’t sign their names to it to give a clue that it was originally his opinion.