Roberts filed the only opinion, which was joined by every justice but Samuel Alito. Alito did not participate because he was not on the bench when the case was argued.
Further:
Roberts, writing his third decision since joining the court, said there are other less drastic options to protest the policy.
"A military recruiter's mere presence on campus does not violate a law school's right to associate, regardless of how repugnant the law school considers the recruiter's message," he wrote.
Maybe this explains why so many lawyers are repugnant!