RF, you're trying to turn a programming decision into a political decision. The Chicks have gotten plenty of press, and people knew that they had a new album out. The fact is that the new album sold about a tenth of what previous albums sold should help explain the reaction by programmers. Country programmers in particular are taking heat for not playing them, but that heat is coming from the media, not from listeners.
The other point that's inescapable is the Dixie Chicks concert sales records. Those numbers - unlike album sales - can't be easily manipulated. The fact is that the Chicks are not selling tickets in areas that were their home base. They're selling tickets in the Northeast - not exactly a hotbed of country music - and outside the US. The rest of their US tour has been downsized or rerouted because people aren't buying tickets.
The Chicks themselves have said that they don't consider themselved country artists anymore. They said that they'd rather have a million fans who "get them", than 10-million who don't. Well, maybe they should either be careful what they wish for, or they should stop trading on their celebrity to make political statements based on their dubious qualifications as political commentators.
Other artists have found that politicizing their music usually restricts their audience. The whole Kerry-for-President Anti-war Tour of 2004 didn't produce big record sales for most of the artists on the tour. Bruce Springsteen did big business with "Born in the USA", which talked about the human condition of people who grew up during the Vietnam era and how their lives turned out. The record made no value judgement on the right or wrong of the Vietnam War, but it made a powerful statement on the effect of war on people. His albums that have been more directly political have not sold as well.
If the Chicks had stayed within the effect of war on the human condition, they might still be selling 10-million albums. Since they decided to become arbiters of the "rightness" or "wrongness" of the Iraq war, people who disagree with either their stance on the war, their use of celebrity to advance political issues, or both, have chosen to not purchase their records or go to their concerts.