You know what kills me? No one asks why Sean brought him on the show. Sean throwing in the scandals a few times didn't help.
Initially when these stories began emerging, I wondered the same thing but the answer lies above in this article.
Hannity's press handlers called the HLI leader the day his column was published to have him address Hannity live on the program. Fr. Euteneuer obliged and began a reasoned, calm presentation of his case. "One is simply obliged not to be a heretic in public. That's the point," said Fr. Euteneuer in response to an initial question from Colmes. "If (Hannity) doesn't agree with his Church on that matter he should not be pronouncing on the matter as if he was the authority on that matter. He's not."