People shouldn't be judged on their views, but on their work.
Ah, so noble and yet so wrong.
You're confusing inherent respect for someone's art with the refusal to financially support it due to political views that differ from your own. You can appreciate Polanski's movies as well crafted, and still not want to line the pocket of a child molester. I can really like Diet Coke, but not drink it because the company supported Apartheid. In the same way, I think that most people who decided not to continue to purchase Dixie Chick merchandise don't suddenly think that the music they produce sucks. They simply decided that, in light of a statement that they found offensive, they would no longer shell out their dollars to the person who said it. That's capitalism, baby. I can buy, or not buy, what you've got to sell for any reason I want. I think the fact that you don't find this particular reason to have great merit is the reason you're reacting so badly. I happen to agree with you. I think that she made a rash, ill-thought out statement that came back and bit her in the ass, or more painfully, in the pocketbook. But if someone wishes not to support her for her political views, I'm totally cool with that.
The bottom line is that people can decide whether they want to line the pockets of someone who they have a fundamental difference of opinion with about issues they deem important. What is at issue here is that ideology does matter when people are spending their hard-earned cash to buy your 'work'.