"From my reading it seems the ' deep state' is comprised of business, political, and military leaders, and their followers who are secular Ataturk."
Ergenekon is not the whole deep state. As I said before, Ergenekon is the action part of the deep state. And yes, Ergenekon supporters are Atatürkçü (like Fethullahci). They claim that AKP is undermining Atatürk's secular ideology. Normally, secular ideology is anti-religious. But, in Turkey this is twisted that a person can both become a Muslim and secular. Because, actually most of Turkish people don't know what really secularism is. They say I support secularism and I am a good Muslim. And some of our citizens act like supporting secularism although they don't, because there is a huge psychological pressure on people through media. A person can't say I support Sharia freely. This gives rise to AKP. I believe that the core squad of AKP don't support secularism. But, you can never read that an AKP member of parliament said s/he supports Sharia. In the same way, a person who hate Islam can't say freely that s/he hates Islam, but they mostly criticize Islamc rules. Yet, still they claim that they are good Muslims. It is ironic, isn't it? We have a proverb "Horse trace is mixed with dog trace". If you don't know deeply what is what, you can't understand who is who in Turkey.
To simplify, CHP supporters are hard secularism supporters. AKP supporters are mostly keen to Sharia but they can't say that. Another party is MHP (nationalist party). Half of them thinks like AKP supporters and the other half thinks like CHP. But, I want to share a survey result that according to Gallup, 74% of Turkish people are keen to Sharia law.
Andd it is also important to note that approxiamtely 17% of Turks are Alevi. They think in accordence with an Islamic ideology, which is distorted I think, that Ali (an Islamic saint) should have been the first caliphate rather than Abu Bekir and also they think that there is no reason to pray salah 5 times every day, because Ali has prayed all of our salahs, something like Jesus sacrificed himself for Christians' sins. Because of that distorted idea, Alevis are far away from Islamic culture. Most of them don't go to mosques. The core squad of Ergenekon comprised of Alevis. They hate Sharia. They fear Islamic state both bacause of their hate of Sharia and because they will lose their authority, control, prestige and money. Actually the latter overweighs. And as you can guess, they generally endorse CHP.
"It has been said of him if he returns to Turkey he will be welcomed much as Ayatollah Khomieni of Iran was in his time. Then there will be a Spiritual revolution in Turkey"
No. This is Micheal Rubin's fabrication. Khomieni and Gülen are very different persons. Gülen's objective is not just turn Turkey to Sharia. Althoug he never says that he will do that, actually I believe that he is dreaming that. But, as I said it is not the only dream of Gulen. Gulen wants Turkey to be again as powerful as Ottoman Empire under Islamic rules. Therefore, he encouraged his supporters to open schools and universites around the world (from Argentine to Indonesia, more than 1000 schools). But, it is crucial to note that he does not support radicalism, Al-Qaida, Taliban, etc.. He emulates Gandhi in that way. He never wants to use guns to turn the country to Sharia. He gains the hearts of people. Their supporters are volunteer to spend their lives fully for that dawa. Anyway, his turn will not trigger anything. Maybe Turkey will turn to Sharia in the future, but that will not start with his turn. This is a process that takes many years. Our public's sensitivity to Islam raised in the last 30 years.
Finally, I am not Fethullahci, but I support Fethullah Gülen.
God Bless you...