There are two main suspects: Turkey and Iran. Many Kurds are pointing the finger at Ankara. After all, Prime Minister Recep Tayyip Erdoğan feigns moderation toward the Kurds only when it suits him, but embraces a hardline approach when he wants to whip up Turkish nationalists. In recent years, the PKK has been winning its insurgency: The Turkish army has effectively lost control of much territory which the PKK now administers in far southeastern Anatolia.
A more likely suspect is Iran.