It depends. Dukat headed the Occupation, but whether he personally masterminded the brutality of the camps is unknown. Most likely the Central Command simply put him in charge and he implemented what they ordered. That said though, I think the writers tried to try an analogy between him and the Bajorans and Hitler and the Jews.
I don't think Dukat overall was a nice person (though that term is admittedly a relative one), but he had as all persons do redeeming qualities. he loved his people, had a lot of charm and charisma, and had good leadership skills. I would also say that he only was characterised as evil when Cardassia joined the Dominion. When he helped the Federation (in The Maquis), and the Federation helped him (in The Way of the Warrior), Sisko and co. had no reason to call him evil.
I don't think Dukat overall was a nice person (though that term is admittedly a relative one), but he had as all persons do redeeming qualities. he loved his people, had a lot of charm and charisma, and had good leadership skills. I would also say that he only was characterised as evil when Cardassia joined the Dominion. When he helped the Federation (in The Maquis), and the Federation helped him (in The Way of the Warrior), Sisko and co. had no reason to call him evil.