Turkish Foreign Minister Mevlut Cavusoglu in a befitting reply to the reports of Syrian army backing YPG has stated that there is nobody which can stop Turkey in Afrin. He welcomed Syrian Army in the region if they fight the YPG but if the former is entering the theatre to protect YPG, Turkish army will not step back.
Turkey has always advocated that YPG is the armed wing of Kurdish Democratic Union Party and both, in turn, have thick ties with PKK. PKK has been designated as a terror outfit by US, EU and even Turkey. PKK has always waged a bloody rebellion in southeast Turkey for decades.