I think you're misreading the article. The thesis is that the journalists are seeking to push their own messages; that the leadership of most news organizations

I think you're misreading the article. The thesis is that the journalists are seeking to push their own messages; that the leadership of most news organizations still favors objectivity, but the rank and file (and the readers) increasingly believe that journalists have a duty to take a stand and deliver the right messages. The article references a moderately well-known incident where many journalists issued loud public objections to a NYT headline, not because the headline was factually inaccurate (it simply summarized a statement a politician made), but because it painted that politician in an insufficiently negative light.