Personally, I believe music should remain non-political. It's like the comment Michael Jordan made when Democrats tried to get him to endorse some of their candidates: "Hey, Republicans buy shoes, too." Why alienate half of your audience (or 95% in the case of the Dixie Chicks) just for the temporary thrill of sticking it to politicians you disagree with?
I understand where you are coming from, but, in my opinion there is something that emanates from a song created from truly held beliefs. If ones primary interest is selling units then Mr. Jordan's opinions are correct. While "The Right Brothers" would love to sell CD's the songs were not written with the primary purpose of being sold.
Music is, and has always been a political device. From it's earliest inceptions, music has been used as a tool for political aims. To assert that music should be apolitical ignores well over two thousand years of musical history, and deprives artists from making their individual statements, no matter how misguided.
Without political connections, Beethoven's symphonies (particulary No. 3, or, the 'Eroica') would not exist. The music of the Renaissance was so political that the ruling duchal families of Italy regarded their staff musicians as integral parts of thier political power. Dmitri Shostakovich was almost sent to a Russian gulag over his music, but he used musical devices to satirize and poke fun at the Communist governments to the delight of the Russian people. The classical connections go on and on, effecting virtually every composer in every era.
Even more politics in music can be found infiltrating every single modern / popular genre: jazz (American race politics, drugs), rock (jeez... pick a band, but how about the Beatles for starters, or maybe all three Woodstocks), country (The Chixie Di... I mean, Dixie Chicks), blues (which dramatically polarized white America), and crosses every international border. Take for example the 1988 "Singing Revolution" of Estonia, in which over 300,000 Estonian citizens sang the songs which the vanquished Communist government banned.
You want apolitical music? Great. Watch American Idol, in which talentless hacks skillessly caterwaul transparent and insipid pop tunes for the voyeuristic, untrained masses. As for me, I prefer the music I listen to to have a message, even a misguided one I might not agree with, or at least some entertainment value.
"Information is not knowledge. Knowledge is not wisdom. Wisdom is not truth. Truth is not beauty. Beauty is not love. Love is not music. Music is the best."
Frank Zappa, "Packard Goose" from "Joe's Garage"