The reason pundits ignore
Christie's social conservatism is that they believe he doesn't actually give a shit. This might be true. It might not be true. But they always think this "culture war" stuff is a sideshow for the little people which messes up the purity of their politics which is about very important issues such as cutting taxes and gutting Social Security. Obvious true believers bother them, mere perceived pretenders don't as much. That Christie would support horrible policies doesn't bother them because it won't affect them.