It is a fact that there are no correct or incorrect opinions.
That's why I'm right and you are wrong in this discussion.
I could hold the opinion that Saddam Hussein should be President of the U.S. because he has a history of peace and non-aggression. Such an opinion would be very weak - because he does not have a history of peace and non-aggression. But the opinion that Saddam should be President is not incorrect, wrong or false. It is an opinion - much like my favorite color is blue is an opinion.