Continuing..
After WW1, the winner countries (alliances) that have colonial empires like England and France within, had already shared whole Middle East with rule and pysical boundaries between them and it was a well known fact that whole ME is/was a treasure house for oil like today.
They created artifical countries like Syria, Iraq without taking their demografical structure into account that they believe will cooperate with them during the colonization process. But groundwork was weak of that structures and even today we can see how fragile they are. They are very open to sectarian and ethnical violence.
With this same divide and rule mentality colonial empires wanted to capitilize the post war condition of Turkey. They encouraged Armenians at the East to fight against Turks with promise of having their own nation state and Greece at East to widen their lands through that once Orthodox lands. Google "megali idea(great idea)", it means; the idea of uniting whole lands that once Greek and Orthodox in the history, under the flag of Greece again. Alliances (England, France, Italy), Greece and Armenians had already shared Anatolian provinces with written agreements between themselves. Then just 1 year after WW I the Independence or salvation War for Turks has started; Turks fought against Greeks at western front, fought against Armenians at eastern front and against France at southern front.
I'll keep it short.. Turkey won that war that lead by Ataturk and that lead to the foundation of new modern Turkey. So thats why Turks seeing him as a savior, seeing him as an anti-imperialist figure and respecting him like French people respecting De Gaulle. And for the same reason, Armenians and Greeks hating him. Also wars especially after 19th century has never been kind to civilians. Unfortunately there is not an contrary example of this. Tell me if you know one..