No one trusts anyone at such times. By the time the world is aware, the warms have already invaded far into a territory.
So, it looks likes NATO may be warming up, too.
A Dr. Thao Bliatout has a saying by the Hmong about two hunters. They haven't been getting along. So, Hunter One says he wants to go hunting and takes out his rifle. Hunter Two says he wants to go hunting, too, and takes out his rifle also. The two have gone hunting; neither has come back.