This makes sense. As we know Suzaku is a holy paladin, in his own head. He does evil with good intentions. Murdered his father, Betrayed his country, betrayed his family, betrayed his friends all for the... i don't think he can answer that at this point. Once he starts on the path to being the Knight of One he will have fully accepted his true path, the path of the Death Knight/Blackguard. He will truly be a incantation of utter evil.