The Ottomans were a caliphate recognised by the muslim world and the Islamic scholars of their time. The Ottomans were no different from the Abbasids and the Umayyads. Secondly, It doesn't matter if he fought for the nation or not, Ataturk was no different from Siyad Barre In fact, worst. He hated Islamic values and did everything to suppress it. Honouring such a worthless man is not good.You're naive. The Ottomans were an empire not a caliphate.
As for Ataturk, he's a respectable guy that fought against Britain, France, Italy & Greece e.g to save his nation after the empire crumbled. Ataturk guided the nation & laid the foundation for economic prosperity & modernity for his people.