As things stand now, the Dragon Clan has evolved into this world's destroyer, an element of instability. Therefore... removing and annihilating the Dragon Clan is the trend of the Great Dao! No one can change this!
The existence of the Great Dao is to maintain this heaven and earth. As for the chaos outside of heaven and earth, what applies there are the laws of chaos, not the Great Dao. If one must describe it in terms of Dao, then the Dao of this world is merely a part of the Great Dao, whose function is to maintain the balance and order of this world.
The Dragon Clan is too powerful, so powerful that they can threaten the entire heaven and earth. Thus, their fate of extinction was destined. As the saying goes, "Heavenly sins may be forgiven; self-inflicted sins cannot be survived." The Dragon Clan split into three major races, and this internal war directly pushed the Dragon Clan toward extinction!