I didn't say anything about "old" and "new" history. I simply said that it is natural and correct that Bulgaria with a big Turkish minority would not present Turks in a bad way in its own textbooks since this could create division among its people. The Bulgarian state needs this unity and historical precision comes, correctly, second. In the case of Greece though not only they can say what they really think but they can also keep some nationalism and exaggerations in their textbooks without any such problems. And since Turks make up over 10% of Bulgaria and they participate in the government that prepares these books, then the nationalism and exaggerations against Greece naturally increase.
I believe what I say here is common sense. The same would/should happen in Cyprus in case of reunification.