One of his main points is that secular nationalism and Islamism have never been so separate in Turkey:
Tactical and transient, the new regime’s [Kemal’s] use of Islam, when no longer required, was easily reversed. But at a deeper level, a much tighter knot tied it to the very religion it proceeded on the surface to mortify. For even when at apparent fever pitch, Turkish secularism has never been truly secular. This is in part because, as often noted, Kemalism did not so much separate religion from the state as subordinate it to the state, creating ‘directorates’ that took over the ownership of all mosques, appointment of imams, administration of pious foundations – in effect, turning the faith into a branch of the bureaucracy. A much more profound reason, however, is that religion was never detached from the nation, becoming instead an unspoken definition of it. It was this that allowed Kemalism to become more than just a cult of the elites, leaving a durable imprint on the masses themselves. Secularism failed to take at village level: nationalism sank deeper popular roots. It is possible – such is the argument of Carter Findley in his Turks in World History – that in doing so it drew on a long Turkish cultural tradition, born in Central Asia and predating conversion to Islam, that figured a sacralisation of the state, which has vested its modern signifier, devlet, with an aura of unusual potency. However that may be, the ambiguity of Kemalism was to construct an ideological code in two registers. One was secular and appealed to the elite. The other was crypto-religious and accessible to the masses. Common to both was the integrity of the nation, as supreme political value.
Here is the full LRB essay, via Alex Xenopoulos. The comments after the essay are worth reading too.