Do you deny that God ordained the peace ?
Not at all. You said the peace would have existed anyway. The peace only existed because Christ was born into it.
The peace existed because God ordained it.
Do you deny that God ordained other periods of peace, as well ... for instance ... the Pax Britannica ?
The Pax Britannica was neither a peace, nor was it from God. Such crimes as the Crimean War are enough to demonstrate that.