I know this may be blasphemy but is it actually good business sense to publish them ? Many papers may have a strongly liberal agenda whilst posing as mainstream but at some point they do have to sell advertising don't they ? A conservative paper should publish them because they quite clearly would appeal to American values, which their readers would support. But if my (eg The new York Times) target audience is a bunch of unionists , Latte fat cats, students and the prison population would I really irritate them just to promote "free speech" and "solidarity". I mean why does a paper have to apologize for appealing to its audience. And yes papers are there firstly to make money for they're shareholders.
I wonder if SOUTH PARK is going to do an episode on this topic. If they did, I'm sure it would be the highest rated one ever.