> If your opinion is based on ignorance, and there exist facts to the contrary, then I agree that you do not have a *right* to that opinion.

What makes you say that? Should people be fined or imprisoned for ignorance or stupidity?

In "1984," nobody had the right to an opinion not promoted by the State. Same in Stalin's Russia, Mao's China, Hitler's Germany. At least no such opinion could be expressed, much less discussed.

Perhaps you mean that nobody should expect or demand anybody else to share in an ill-founded opinion?