Why is Obama leaving these people to be murdered?------The Siege Of Kobani: Obama’s Syrian Fiasco In Motion

The Siege Of Kobani: Obama’s Syrian Fiasco In Motion | David Stockman's Contra Corner:
"Another humanitarian catastrophe may be just hours away at Kobani. 
The latter is the Syrian Kurdish town on the border with Turkey that is now surrounded by ISIS tanks and is being pounded day after day by ISIS heavy artillery.

Already this lethal phalanx, which fuses 21st century American technology and equipment with 12th century religious fanaticism, has rolled through dozens of Kurdish villages and towns in the region around Kobani, sending 180,000 refugees fleeing for their lives across the border.
Self-evidently the lightly armed Kurdish militias desperately holding out in Kobani are fighting the right enemy—-that is, the Islamic State.
So why has Obama’s grand coalition not been able to relieve the siege?  
Why haven’t American bombers and cruise missiles, for instance, been able to destroy the American tanks and artillery which a terrifying band of butchers has brought to bear on several hundred thousand innocent Syrian Kurds who have made this enclave their home for more than a century? 
Why has not NATO ally Turkey, with a 600,000 man military, 3,500 tanks and 1,000 modern aircraft and helicopters, done anything meaningful to help the imperiled Kurds?"