Because he made it look one-sided as if only the Greeks committed atrocities.

The Turks were condemned by the EHCR for their crimes against humanities.

The Turkish militia organized death squads with the intent of murdering and raping Greek civilians. The amount of rape was so bad even the Orthodox Church started to support temporary permission for abortion.

The international community defined the actions of Turkey as an ethnic cleansing.

People like you want to push the idea that Turks were innocent and all the atrocities were done by Greeks, I believe the matter is far more complex with atrocities happening on both sides but you reject that. Am I a terrible person for recognizing the suffering of both sides? Nice