Nobody is outraged or infuriated. People do what they do. Rivera does what Rivera always does. Beck does what Beck always does. Same for Shepard Smith, Bill O'Reilly and the rest.
You got the gist of the article as well. Of course, it's The Guardian, so we can't expect anything like objective commentary from the likes of these people. I always read the comments from the ignorati in the comments section who chime in with the writer to laugh at the inane comments. Oh well, American lefties don't get American conservatism so I shouldn't expect Brit lefties to get it either.