TNR's existence since at least the Michael Kinsley days is plausibly a conspiracy to get conservative readers.
Rosen tends to assume that female and non-white judges are unqualified (he wrote an article on how Clinton nominees just weren't smart enough to keep up with all those Federalist Society members). Also, his brother-in-law would probably have gotten promoted in one of Sotomayor's rivals got the job.
Putting aside his motives, it's a really shoddy article that's going to be brought up AGAIN AND AGAIN AND AGAIN during the confirmation debate.