Please pardon me for interjecting on a few points here....
May I speculate that said unbelievers were not sufficiently literate in the Hebrew bible or in hermeneutics to think critically about the issue? By introducing such an apologetic at an early stage, one is courting fallout once their audience develops enough literacy to notice the weakness of the apologetic. So the strategy is potentially short-sighted.I've presented typology in an apologetic sense to unbelievers when they've expressed an interest. (I'm sure you have too). Isaiah 53 is used often in apologetics . . . hmmmmmm . . . .
A most important thing is to recognize what typology does and does not accomplish. It can illustrate thematic parallels and it can serve a poetic/artistic function. It cannot demonstrate prediction. This is why referring to texts as "double-prophecies" is perilous, when the context of a prophecy actually does not support a second direct reference to Jesus.
Matthew's apologetic strategy may have been quite effective in his milieu, seeing as many of his contemporaries used similar methods of interpretation. Although some modern thinkers would take issue with his thought-processes, many of Matthew's contemporaries would not. And it is quite likely that Matthew himself found typological observation to be convincing.In Matthew's historical setting I wonder if he might have seen his quoting Is. 7:14 as "an apologetic" in any sense? We know he was trying to persuade his readers who were Jewish, according to tradition. Was/is Matthew doing Inspired-Apologetics, if i may coin the phrase?
The question of inspiration is intriguing. Matthew's writing is directed to a certain audience in a certain time and place. Might God inspire a messenger to use relatively weak reeds for circumstantial advantage? Perhaps. But then again, it would not be at all surprising for a well-intentioned witness to point out things that were meaningful to his mind, without that necessarily reflecting the mind of God. Matthew does not claim to be an inspired document - that claim has been externally imposed upon it by the church. As such, we might entertain the possibility that Matthew was partially, yet not meticulously inspired. In any case, Matthew is valuable as a historical witness - if not an infallible one.
I realize that this may seem cold comfort to many Christians, but let us transcend emotional reaction for a moment. We handle many hundreds of life-or-death decisions, on a daily basis, based upon less-than-perfect evidence. Why is it necessary that the witness to particular historical events must be infallible? Christians must acknowledge the practical limitations of their text: it is written in languages that no man living speaks, using words that in some cases not even experts know the definition of, engaging historical and cultural contexts that we are imperfectly knowledgable about. If God were not directly available to us in prayer, then he would seem a poor caregiver. But proper relationship with God is not dependent upon the perfection of a book, especially in points of narrative detail or incidental observation.
Shalom,
Emmet