Considering that many smart people believe in opposing ideologies, many of those being extreme and some which I think are really stupid, I can't believe that. I'd consider empathy and open-mindedness much more likely to correlate with support for good policies. Also people tend to disagree on what policies are good. People disagree on what good basic principles are, what the likely outcomes are, and whether those outcomes are good or not. There is disagreement even among smart people, even after the stupidity of much of the drug war.