Just by saying there's a new testament, though, Christians are saying that God's will has changed or that Jews have evolved in their understanding of God. So they can contextualize Ezekiel, and reinterpret the Old Testament through the new lens provided by Jesus's so-called incarnation.
I find that biblical contradictions provide strong arguments only against inerrantists, but those fundamentalists are usually too far-gone into cultist thinking to be worth arguing with in the first place.
That's a good point, though, that the idea that we need saving is a backhanded compliment, or a case of victim blaming.