Truth is uncomfortable for most people and therefore always impopular in democracies, so we ridicule the messenger instead of listening to what he has got to say. Obama became president only because he appealed to popular consensus (#1 He's black and #2 he wanted "Change," yet no one could define what Change he sought to create). When we understand this, we also realize how self-destructive it is for a nation to uphold the popular priests instead of the intelligent philosophers.
Here is Peter Schiff, previous economic adviser for Ron Paul during his presidential campaign this year, predicting the crash of the US economy - and getting laughed at for it. Everything he said is today pure facts.