I think principle is very important, but if you don't get anyone elected, how are you going to get your policies implemented? I've decided half a loaf is better than none.
If you happened to lose your job, would you work at whatever you could until you could find a new job you liked, or would you sit on your rear and whine about not being able to find the perfect job as you starved and lost all your possessions?
As for Nader's vote tally, heck the man has been running for years. Sooner or later people start to vote for them. We constantly hear about this 'incrementalism' the Republicans are trying to sell as the excuse for expanding and not limiting government. It's the same with the votes. Nader has been doing it over and over. And in some states he's giving a showing that I imagine Democrats and Republicans alike don't appreciate. Somebody is trying to kick them off the top of their hallowed hill with a message out of the ordinary
I'm not saying we'll see some 20-30% runup with a conservative third party this year or even next election cycle. But you have to admit, some citizens of the respective states are getting restless. The Republican party is going conservative when it matters less and less. As this continues, will 'flyover' country be voting solid Republican 25 years from now?
These purists must not have confidence they can win primaries or why would they do this?