The word "are the opinion" refers to a singular perspective or belief held by one or more individuals. The antonym for this phrase would be "are not the opinion," indicating a lack of agreement or dissenting views. Another antonym for "are the opinion" could be "are undecided," meaning that there is no clear viewpoint or stance on a particular subject. Alternatively, "are open-minded" could be an antonym, suggesting a willingness to consider multiple points of view and to remain receptive to new ideas and perspectives. Each of these antonyms presents a contrast to the concept of holding a firm, singular opinion on a given topic.