A viewer continues: “Were Reptilians always Reptilians in their appearance or is it a result of their self-image due to corruption?”

They have always been Reptilians and were created with that configuration to make them fearsome and to have a toughness suited to the task of dealing with the Anunnaki, who were already corrupt psychopaths with great technological prowess and thus a formidable foe to any other civilization attempting to rein them in and limit their power.