As the Media Matters site documents in considerable detail, Hannity is the master of the half-truth, routinely but purposely leaving out information that runs counter to his preconceived ideas about the evils of all things remotely liberal or centrist.
It's not fact-based opinion that Hannity spouts every day, it's full-bore intellectual dishonesty. On the other hand, no one ever accused Hannity of being intellectual, or even especially thoughtful. He's not.
The man's a hack. His unofficial motto: "Don't confuse me with the facts. My mind is made up."
The details on Hannity's year of misinformation can be found here.