Unfortunately, it is common in human nature to only read the ideas we already agree with. It is unlikely that we will seek out opposing views and contrary opinions. So, once we have made up our minds about a subject, we only seek out affirmations of our beliefs.
So, if you are predisposed to hate minorities, you will find plenty of supporting opinions dressed up as facts online. No matter what your position on any subject, you will easily find more ammunition with a simple Google search.
But the problem is how do we separate out the useless noise from the useful info? Is it possible to create a Credibility Score for people online?