Patteran
A nowadays excuse
In the sense of concentrating resources on building their own autonomous areas instead of supporting FSA and secular groups in the fighting in other areas against assad and the islamists - in fact, actually clashing with them on occasion. This weakened both and allowed ISIS/assad to sneak into strategically key areas through the gaps that mutual distrust/distance between kurdish groups/rebel groups created. Instead of watching each others back they turned blind eyes - or at least decided their resources were better spent on themselves. Until it was too late.
Gotcha - and thanks again for the responses.