[WalterBright]

I read books that have contrary opinions to mine so I can understand their ideological underpinnings and mistakes.

People who only read things they agree with means they're blind to the problems with it, and fold like wet cardboard when they try to argue it.

[pc86]

Or even more likely, as soon as you make a point even slightly against their beliefs they call you a socialist/communist/fascist/Nazi/whatever cliche they hate the most that particular day.

[mindcrime]

Yes, exactly.