The current situation in Syria is much more than just the mistakes of the Sykes-Picot Agreement.
With the benefit of hindsight, it's easy to say that the Kurds should have been given their own nation state. Yeah, that's a good point but it's very easy to breezily declare that with 20/20 vision/hindsight.
The Middle East has always been a region rife with tribalism, massacres, 'holy wars', beheadings and genocide.
Here's a clip from a day or two ago in northern Syria. Syrian Sunni extremists, supported by the Turkish army, promise to behead any 'infidel' Kurd they find. A truly disturbing threat, when we consider the fate of James Foley, Stephen Sotloff, David Haines and Alan Henning.
And here's another thing: a large chunk of our mainstream media are highly critical of the USA being the world's policeman. And these same media criticise Trump for pulling troops out of Syria.
Well, what's it gonna be?
You can't have it both ways, darlings.