Think about it. How the hell do you know that your political beliefs (assuming you have any) aren't just total rubbish?
Self-proclaimed empiricists are often on the progressive or social democratic part of the political spectrum. But do those beliefs have any empirical basis? Is it just that empirically and scientifically-minded people have similar personality types?
At the same time, your stereotypical "Bible basher" is a social conservative. Yet Jesus said that it's nigh impossible for the rich to get into heaven, and that his followers should give all their possessions to the poor. Those are hardly great conservative principles.
Aren't political beliefs just pointless things for people to bicker over and use as excuses for why society is so shitty, instead of actively trying to make the world a better place? Isn't politics just a childish fantasy?
"Things would work much better if we introduced more [free market elements/government regulation] thereby making things [more efficient/fairer]. This will never happen, though, thanks to those [liberals/conservatives] in the establishment who want to [take all your money and give it to immigrants/steal candy from poor children and give it to greedy corporations]. Oh, if only everyone thought the same way as me, then everything would be brilliant!"
That's an oversimplification of the diversity of political views, of course, but often I find in internet discussions that it inevitably comes down to Hayek vs Keynes. And whatever people say, their side of that decades-old debate really comes down to which side makes them personally feel more comfortable. Which isn't really a great way to establish facts.