More likely, Newt scoring 0% with the 18-29 cohort simply means the poll is junk. NOBODY ever scores 0% with any cohort in any poll ever. That's pretty much statistically impossible.
You are probably correct. I do think though that conservatives really need to try to reach young voters on those issues where both conservatives and libertarians are congruent. Smaller government, lower taxes and personal liberty as guiding principles. I think Newt could pry much of Paul’s support away, but it would through those overtures, not through ad hominem attacks (however justified they may or may not be) on Paul.
/facepalm