I don't think that Lazs is saying that only the GOP is doing anything, simply that he prefers the GOP to the Democrats. To that end, he chooses not to support a potential 3rd party candidate that will syphon votes away from his party of choice (whether he likes the 2 party system or not, he recognizes that the winner of this election will be either a democrat or a republican).
He's not saying that a vote for Hillary or Obama would be done just to prove a point, but rather that voting for Ron Paul on a Libertarian ticket (assuming he looses the GOP nomination), would be tantimount to helping Hillary or Obama win the election. (see the Y2K voters for Nader).
This is what we've got, and unless and until we change our electoral system we're stuck with it. I'd like to yield the floor to +Dead to explain why proportionate voting systems lead to sub-optimal outcomes, but I don't think he'll take the bait.
Ayhow, as BSD points out, Ron Paul is running as a Republican, so if you like the fellah, throw your support behind him in the primaries, and lets see how far we can push this thing. It's a good election for an outsider; as good as any in recent history. Both sides look to have contentious primaries, with no clear frontrunner. Hopefully the political bloodbath will rage on both sides all the way throught he Primaries.
-Sik