"Airstrikes in Syria shifted from the besieged city of Kobani toward the oil facilities that fund Islamic State fighters"

oh, really? and, who is buying that oil?

two points:

(1) cut supply. keep prices high. again.
(2) if the oilfields are in syria, it is syria that loses the infrastructure when they are destroyed - regardless of who or what temporarily controls them.

they're destroying the syrian infrastructure. i don't need a patrick cockburn or robert fisk article to explain that, it's clear as day.

https://www.usatoday.com/story/news/world/2014/10/18/isil-kobani-airstrikes/17507239/