As Scalia pointed out, we are one of the few countries in the world that has legalized abortion. Are we going to cite international law on that one too or are we just going to be selective about it?
Kennedy's opinion cited a supposed "national consensus", when there isn't one in the nation, and there isn't even one among the justices. The only opinions that matter are those of the five lawyers in robes, the only "consensus" THEIR consensus.