I do not state that all his interpretations are correct. I am hardly a judge of that. But no one has accused him of major flaws. His position on Rusyns is not at the center of his work. It is in fact very peripheral.
History is an interpretation of the past.
Everyone is entitled to some form of interpretation. Norman Davies is a great historian and not everyone agrees with his interpretations. It is a matter of how well you do it. His approach is that of the territory of Ukraine and not of the Ukrainian people. Ukrainians object that he would include minorities in his history.