Anonymous" If this is an intro to philosophy class that you teach in a secular institute, then your textbook is quite inappropriate. It is too slanted to the Christian perspective. If my child attended said institute I would most loudly complain about the misuse of public funds to further a Christian apologetical agenda.VR: I didn't choose the text myself, and this particular class is at a Christian institution.
But I don't know about objecting to the apologetical agenda. My own personal approach in classes tends to downplay any apologetic agenda I might have. I'm not much of an advocacy teacher in the classroom. Teaching the subject is more important to me than defending my own positions. I usually just refer students to my blog if they want to know my own positions.
However, I have seen plenty of philosophy teachers with explicit anti-religious agendas who push their non-belief on students. They make it a mission to destroy the faith of their students. It seems hypocritical to criticize advocacy teaching my Christians but not by non-believers.