I can understand why people would support Ralph Nader's ideology, but I can't understand why anyone would vote for him. If you vote for Nader, it means you are more concerned with making a statement than making sure the better man gets elected. If you think that there is absolutely no difference between Kerry and Bush and Kerry is equally as bad as Bush, then vote for Nader. But if you think Kerry would be better than Bush, even if you think he's worse than Nader, than vote for Kerry. If you vote for Nader, what you are not doing is voting for Kerry, and helping Bush get more votes than Kerry.
For those who say that Nader makes no difference, this isn't quite true. Exit polls from 2000 of Nader voters show that 50% would have voted for Gore, 20% for Bush, and 30% would have stayed home. So, if Nader hadn't run, Gore would have won Florida, and with it the presidency. And can any Nader supporters really argue that Gore wouldn't have made a better president than Bush?