I don't believe rightness applies to opinions. I agree with you on that they can be sickly formed, but it doesn't make them incorrect in any way, because they're a piece of subjective perception of reality, just like a fact is a piece of objective perception of reality. Here, let me do a run for it so you'd understand what I mean: "I believe the Earth is spherical rather than flat". "I believe people ought to be treated equally, no matter the color of skin" to a racist's face. Opinions are amoral, intent can be immoral. Believing in solving overpopulation through killing off people bears no morality on its own, but the intent behind it is immoral. This, of course, raises the question of whether opinions and intents behind them are separate. Expressions (words, phrases, sentences) can be dishonest; opinions in themselves bear no property of honesty or lack thereof. Again, a question is raised - whether expressing opinions is separate from expressing any other personal thought - but that's beyond my point.Opinions can conflict with fact.
Opinions can be undesirable.
Opinions can be immoral.
Opinions can be dishonest.
Opinions can be moral. Someone who holds racist opinions will act immorally towards those groups they are racist against. The opinion itself is the source of the behavior, and so long as someone holds a racist opinion, they will act in an immoral (racist) manner. The opinion is therefore also immoral; it's not moral to continue to hold an opinion which influences your actions towards immorality.