So even if xians have the facts wrong, when asked about how the jews would answer, most xians would faithfully respond with the jewish viewpoint.

No, the question isn't what would someone of the other faith say, the question is what do the scriptures of the other faith say. Here it is again:

"If I consult the scriptures of the religion you don't belong to which path I should take to get to G-d, what would those scriptures say?"

The essence of xtianity is that all of the Jewish scriptures (the Tanakh) say that the way to G-d is through J'sus. J'sus had simply not arrived to make this clear. Thus, if you ask a xtian this question he will say that the Jewish scriptures say that the way to G-d is through J'sus.