Justice Scalia''s statements don't support what we have in Alaska because the Republican Primary allows participation by nonparty voters.  This is from the opinion you quoted: " "A single election in which the party nominee is selected by nonparty members could be enough to destroy the party."  

Well, many participants in the Alaska Republican primary are nonparty members who are poised to "destroy the party" according to Justice Scalia;  therefore, this decision doesn't seem to fit our situation.