Truthers (whatever the hell that means) didn't do anything that hurt Ron Paul other than fail to register and vote for him, which they definitely did fail to do.
Hannity, Limbaugh, O'Reilly, Kristol, Gergen, Coulter, ABC, NBC, CBS, Fox, WSJ, NYT, LAT, Washington Post, etc. THEY did everything in their power to hurt Ron Paul.
People who don't buy the official explanation for the 9/11 attacks are in the majority of Americans, according to every poll taken on the subject. That means that approximately 150 million of them did not vote at all in the primaries, much less not vote for Ron Paul in the primaries...PERIOD.
The media demonize all opposition by singling out the radical minority of the opposition and making them out to be 'nutjobs', 'moonbats', 'tin foil hat wearers', etc. They always have. That doesn't change people's minds, it only makes them afraid to say what they really think to avoid peer ridicule.
Look at what happened when Oliver Stone's JFK was released. There was even a Seinfeld episode that goofed on people who believed in JFK 'conspiracy theories', spoofing a scene from the movie.
But...simple truth be told (and backed by the numbers), people who don't buy the official story of the 9/11 attacks did not register and vote in the primaries.
If they had, and they voted for RP, he would be the nominee, hands down, regardless of what anyone here thinks would have happened to the contrary, 'they hurt his chances' theories notwithstanding.
Bosso