Judgement

The Onion, a satirical news source, has an article today that says Obama sent out a 75,000 word e mail full of incoherent statements, contradictions, obscenities, typos and general disorientation. www.rawstory.com
The website Fox Nation jumped all over it as authentic, commenting on it, not understanding it was satire. (For those not used to publishing, many novels are only 50,000 words long. A 75,000 word e mail would cover 350 printed pages!)
Why did they not see the satire? The folks at Fox probably did, but deliberately promulgated it simply to reinforce their narrative.
But the bloggers and comment-writers did not see the satire. Why not?
Stupidity is not the deepest answer. We all have a tendency to believe what fits the mental world in which we live. Objective criteria (75,000 words one night!) and congruency (elite intellectuals don't write that, even if you hate elite intellectuals) are easily brushed aside if the information fits with what I already think.
We all have a rather subjective world that we have to monitor by reading, discussion with people who don't agree with and the art of critical thinking.
Ideology is communal, egotism is personal, but they both prevent us from making good judgments.