It's not so much the liberals, in the traditional term.
What has happened is that for the last 5 years, we have had to deal with liberals wanting out troops to die, and our armed forces to lose, so that they can score political points against the GOP.
It has thus become a matter of faith that anyone who questions our role in Iraq must be a liberal who wants our troops to die.
So, along come Ron Paul, who asserts that, well, maybe we should just mind our own business in this world... and people can't even process that perhaps he might not be a liberal who wants our troops to die.
This is evidenced by the absurd idea that he is in fact a liberal, or a democrat.
I have seen comments on FR and elsewhere that they are seeing the light on this issue, even if they do not necessarily support Paul's campaign (yet?!).
The more people hear what Ron Paul has to say rather than what the media says Ron Paul says, the more they will understand Paul's desire for a more conservative foreign policy.