Honeybee
If I got it right, these three nations don't say that Turkey be left to fend for itself in the event of a war. But there's been no formal declaration of war as yet, and in this particular case, because there's no concrete evidence for starting a war, every effort must be made to stop a war. If Turkey's defences are bolstered through the NATO channels, it means NATO has resigned to the possibility of war as the only possibility, indirectly meaning NATO is bracing itself for war. Exactly what the three nations don't agree to.
Why wait until war is declared? What if Iraq launch an immediate and desperate attack into Turkey as soon as war is declared? It will be too late then.