You need to separate the Kurdish Autonomous Region of northern Iraq from the Kurdish independence movement in SE Turkey. Turkey has good relations with the autonomous administration, who themselves are distancing themselves from the PKK who operate just inside the Iraqi border. There was a Twitter feed today urging the PKK to take the fight elsewhere after unverified reorts of civilian deaths in a TAF air raid on PKK fighters who have melted into local villages. Sadly, even otherwise intelligent Turks become rather emotional about 'the mountain Turks' but the PKK are a rather murderous bunch (40,000 have been killed since the early 80s; the Turkish government downplayed attacks against SF over the last two years, even though many soldiers and police died, in an effort to keep the ceasefire/peace talks with the Kurds on track.
Erdogan finally realises that ISID can and do operate in Turkey and, as such, threaten his regime and kelptocracy of his close family and senior AKP officials. Corruption, in favour of the ruling party pervades almost every aspect of business and political life in Turkey. Luckily the forces remain pretty clean, although it is likely the young conscripts manning border posts could be bought for a few dollars. However, as posted above, go are the days of alcohol and very Western hosting by Turkish officials; also too, head scarves are very common now reflecting the wider Islamist shift of the country.