I have never called Israel an enemy of God. My contention is that God is no longer dealing with Israel, or any other nation, as a singular entity. There is no old covenant any longer. If the old has passed, and God cannot lie, it necessarily follows that what was promised has been fulfilled.
The prevailing teaching over the last 150 to 200 years has been contrary to this. And when people are taught certain understandings by a trusted source, whether it be religious or otherwise, it is difficult to wrestle the understandings loose, even with truth.
I rarely speak to eschatological issues on this site, for the reason given. But ask yourself this: given the incredibly vast difference between the two covenants, why would anyone desire the old?