Fox News isn't worthy of being called news. They misrepresent so much that they're nothing more than propaganda. Some say that Fox is the propaganda wing of the right wing extremists in the Republican Party, that Fox works for them. Others say that they right wing extremists in the Republican Party work for Fox. I'm not sure which is true, or if the truth is somewhere in-between those positions, but it's irrelevant to me. Fox lies, and they cannot be trusted.
I'll admit that I don't know O'Reilly very well, so I might be totally wrong here. But it seems to me that although O'Reilly is wrong about a lot of stuff, that he actually has more integrity than most of the people over at Fox. But like I said, I could be totally off base there.