Let me start off by admitting, no I haven't read it, and by adding that I will never read it...but I haven't read any pornographic novels, including 50 shades of gray, and I am still quite comfortable that I can speak against them despite not reading them.
And let me add, right up front, that neither am I a fan of Mr. o'Rielly.
With those disclaimers, and having only heard his 60Minutes interview about the book, here is my objections:
He claims it is not a book on the religion associated with Christ, but only a history.
I'm sorry, but my faith tells me that try as we may, the divinity of our savior cannot be separated from his humanity, the Church, centuries ago codified Christ having two natures, human and divine.
And, his claim that writing the book was an inspiration by the Holy Spirit (a claim he made several times in the 60 minutes interview) on several levels does not ring true in my heart or mind.