The impossibility of achieving a workable ceasefire in Syria was made clear by a blustering speech US Secretary of State Kerry made to the UN Security Council on 21st September 2016.
Possibly alarmed that European governments - including especially the German government - are failing to support US claims the relief convoy attacked near Aleppo was bombed by the Russian air force; and by the fact that the UN appears to have dropped its assertion that the convoy was bombed from the air; and perhaps even more alarmed by Russian demands for an independent investigation of the whole incident; Kerry went on the attack, listing what he said were Russian claims about the incident, which he either misrepresented, or represented in such a way as to make them look inconsistent and contradictory, when in reality they are no such thing.
More to the point, Kerry also demanded the grounding of the Syrian air force over what he called 'the contested areas' of northern Syria. This is a strange demand to make in the immediate aftermath of the attack on the relief convoy.
The US says off-the-record that it was the Russian air force that attacked the convoy. However Kerry is demanding that the Syrian air force - which no one claims carried out the attack - should be the one to be grounded.
Presumably somebody subsequently realized the lack of logic in this demand, since some Western media reports of Kerry's comments are giving the impression that Kerry demanded the grounding of both the Syrian and the Russian air forces. The full text of his remarks released by the US State Department however shows this was not the case.
Putting all that aside, Kerry speech was in essence a reversion to a demand the US made following the previous cessation of hostilities agreement in February: that the Syrian air force - and implicitly also the Russian air force - cease bombing Jabhat Al-Nusra even though Jabhat Al-Nusra is a terrorist organization which is expressly excluded from the ceasefire. Here is how Kerry justified it
"Now, I have said to Russia many times it's very hard to separate people when they are being bombed indiscriminately and when Assad has the right to determine who he's going to bomb, because he can, quote, "go after Nusrah" but go after the opposition at the same time because he wants to. You create a confusion that is impossible to separate out, and therefore preserve the ceasefire.In other words, instead of the Syrian opposition separating itself from Jabhat Al-Nusra in order to gain the protection of the ceasefire, the US wants the ceasefire extended to Jabhat Al-Nusra, so that the Syrian opposition can - in a manner and date of its own choosing and as part of a process of "political transition" (US code for regime change) - separate itself from Jabhat Al-Nusra when it feels like it.
So we need to get to the prohibition on flying, my friends. That would prevent Syria from doing what it has done so often in the past, which is to attack civilian targets with the excuse that it is just going after Nusrah. Our purpose in this negotiation was to put an end to the kind of horrific and indiscriminate attacks that have been the primary cause of fear, of suffering, of displacement. And under our plan, all of this could be quickly accompanied by serious negotiations between the parties aimed at a political transition and a conclusion to the conflict."
The Syrian opposition has consistently refused to separate itself from Jabhat Al-Nusra and will never do so unless it has to. If Kerry's demand were accepted, then the Syrian opposition would no longer be bombed even if it remained joined to Jabhat Al-Nusra. In that case it would not separate itself from Jabhat Al-Nusra since it would not have to. Jabhat Al-Nusra in the meantime would be free to attack the Syrian military - since it would not be part of the ceasefire - without having to fear any bombing.
In other words what Kerry is demanding is that the Syrians and the Russians agree to impose a no-fly zone on themselves so as to let Jabhat Al-Nusra and the Jihadis win in order to enable regime change to take place in Syria.
That is an absurd demand, and Kerry surely knows it. It is also one which - as Kerry of course also knows - the Russians have consistently and categorically rejected whenever it has been made to them. That Kerry is making it now in spite of all that shows that the US has abandoned the commitment to separate the fighters it supports from Jabhat Al-Nusra, which it made just 2 weeks ago in Geneva.
What that means in turn is that the Kerry - Lavrov agreement is now dead. The whole point of the agreement was that the US would separate the fighters it supports from Jabhat Al-Nusra , in order to secure the ceasefire. By saying that the ceasefire should be extended to protect Jabhat Al-Nusra from bombing, the US is in effect abandoning that commitment.
The US is still trying to reassure its European allies - who are becoming increasingly alarmed by the unraveling of the agreement - that it remains committed to it, and that there is still some life in it. Kerry's words to the UN Security Council however tell a different story.
This latest attempt to end the war in Syria diplomatically has therefore failed, and the war is set to continue.
In the meantime it is worth emphasizing that no less a person than the US Secretary of State has now publicly said in the UN Security Council that Jabhat Al-Nusra - an entity which the US says is a terrorist organization and which is the regional branch of Al-Qaeda in Syria - the organization which carried out the 9/11 terrorist attacks - should not be bombed.
One wonders what the survivors of 9/11 - and the families of the victims - would think of that.