I'm going to dissagree with you. Lev 26, says that if Israel obeyed God they would live at peace in their land. If the disobeyed they would go into exile. If they repented they would be restored to their land. If they didn't repent, God would still not utterly destroy them in order to keep his promise to Abraham.
Thus, while God may have used Christianity to help restore Israel, He would have restored them regardless.
It's a bad argument to tell Jews they owe their existence to Christians. They don't. They owe their existence to God.
I live by the New testament, and it says Israel will be living in sin until Christ returns. My point about Christianity was that Christian nations basically established Israel and has given tons of aid to insure its survival. This was in the context of a discussion regarding how I think Israel is unappreciative in light of their outlawing Messianic Jews from converting Jews to Christianity.
So while God may have used Christians to help Jews, one can also say God used Christians to punish them in the past, yet that, being negative, is controversial. I don't think I believe either. It is also said God used Hitler to punish the Jews, and I find that highly offensive and utter bull.