This is well worth reading both in itself as a polemic to Michael Moore, and for the series of comments following the article among many people who do believe in the the importance of supporting Nader/third-party candidates, because they believe, as I do, that in the long run the dangers of not doing that are greater than the dangers of the short term.
I've yakked on about this before, and even though I'm inclined to vote for Obama this race, I realize it's for rather facetious reasons. That is, as with Democrats in general, I find it so much more soothing for a President that says things I believe in, even if, like Republicans, he will go ahead an do just about everything I don't believe in, at the benefit of perhaps marginally slowing the downward spiral of inequality and environmental destruction. I believe that, at least for the moment, people won't turn from the two parties without a) massive grassroots work that affects the levels much below the presidency more than the presidency itself, rendering the presidency more symbolic than central to the struggle, and/or b) another major crisis, this one with the Democrats fucking up as badly from an executive standpoint as GWB has. (This is not at all implausible -- Gore war reportedly for war with Iraq during the Clinton presidency; also, if the reality of what Dems have done were common knowledge, people'd realize that, at least foreign policy wise, they already DO fuck things up on a similar scale, not to mention that the Dems have avoided far more blame than they deserve to for fucking GIVING GWB THE BLANK CHECK HE FUCKING CASHED IN RE: IRAQ. He might've gone over their heads had they not voted with him and fought Iraq anyway, but we'll never know since the Dems caved on the Use of Force and PATRIOT ACT resolutions -- but since they weren't the executive, they've gotten away pretty clean in our unspoken-monarchy-obsessed country.) Change likely won't start at the top, and since my analysis of history is that a truly populous grassroots movement is enough to sway almost any president, regardless of party... well, that's how I rationalize how voting for Obama isn't at cross-purposes with what I believe in. (It really and truly is, if you look at his actual politics, but damn it, it's been so long since someone even sounded inspiring...)