With the violence in Syria spilling into Turkey; Turkey as a NATO member has the right to call on the support of the alliance under Article 5. However implementing collective security is always more complex, thus a full scale NATO response in Syria is unlikely.
Turkey's recent diplomatic offensive has been brought to an abrupt end by the Syrian conflict which spilled into Turkey last night. Last night's violence has revealed the weakness in Ankara's position resulting from its failed approach to the Syria Crises.
The recent protests in the Middle East may have been sparked by the anti-Islamic film produced in the US, but Middle Eastern opinion has been shaped to a much larger degree by US foreign policy rather than its cinematography.