I haven't read the full opinion yet, but for those of you blasting Scalia you should understand that he has a history of being a strict constructionist and a real ball buster when it comes to constitutional/statutory interpretation. Most of his opinions advocate for following long standing canons of statutory/constitutional construction, with a very heavy emphasis on the textual canons. Once you understand that his opinions are almost entirely predictable.
Lol. Maybe you should read his opinion. Or just read Robert's Majority Opinion where he uses Scalia's own words in prior cases to make his point against Scalia. Maybe then you will have a better "understanding" of Scalia.