That much, I think, is true. The only thing I have against Bob Barr is the idea of not finishing what we started in Iraq and Afghanistan, and the whole nexus of issues around the GWOT. I believe him to be wrong in that regard, at least to the extent that I have read.
I don't know how that can be squared with a true Conservative sense. He must meet all three pillars of Conservatism squarely, or I am afraid I cannot lend him my support. But I am willing to be convinced.
I believe that Barr was hired by the ACLU just to destroy his credibility with the conservatives. He might be singing the Libertarian Party's position, just to get their nomination, which also destroys his credibility.
But Barr's actions while he was in office was starkly conservative, and I believe he'd finish the job in the middle east only with victory.