How did they report what they didn't find?The point is not what was uncovered, but rather that they did the investigation.
This just drives home the point.
They ignored Sarah Palin's ties to the anti-American segregationists, but they were all over Barack Obama serving on the same inner city education improvement board as Bill Ayers.
What you have is known as a confirmation bias. You are not special, we all have a bias to one degree or another. If I believe something I want my belief to be true. Therefore, when I see or hear something that confirms my belief I am biased toward it. And when I see or hear something that contradicts my belief, I am biased against it.
The only difference between the sage and the fool is that the sage knows he is a fool.