She may not have been actively biased against Arabs, but she was most likely inherently so, given the time.
Based on her memoirs, I don't think so. She spent several years running schools and an orphanage in Beirut and Damascus, and seems sincerely sympathetic to the Arabs.
Her discussion is colored by a certain amount of the "national character" discourse common to the times -- Turks are like this, Arabs are like that -- but not usually to the detriment of the Arabs. The train episode is unusual and stands out.
Also, if she wrote that later, it would probably be colored by nationalist fervor.
I really don't think so. Halide Edib was a nationalist, but definitely not a "fervent" one. She grew up as a late-Ottoman liberal, and her ideal was a tolerant, multiethnic, multicultural Empire.
She joined the nationalist cause during WWI, but it was very much faute de mieux. She and her husband were, important members of the Kemal administration in the early years, but by the middle 1920s they had become persona non grata for their *lack* of nationalist fervor. They ended up going into exile around 1925, and didn't return until after Kemal's death.
Doug M.