Opinions are perceptive. If you feel cold, yet the temperature is 60 degrees, are you wrong? Yes, and probably ill to boot. I figure that opinions fall into categories. There are perceptive opinions and decisive opinions. As I mentioned above, a perceptive opinion is what you see, or feel, or whatever. In the example of race, if you got beaten by a black male, who proceeded to steal your wallet, all day, you'd think "That lowlife, scummy ******. I hate black people!" which is, of course, a perception. It then aids you to create a pigeon-hole which is quickly filled with pigeon because of your previous experiences.
A decisive opinion, however, can not be wrong, nor right. It may be your opinion that God exists, but you can't prove it, and I can't disprove it.
So there's no real yes or no answer to your question, OP. Sometimes, like everything else in life, your opinion may be wrong. Other times your opinion is like a bullet-proof vest in which, no matter how stupid you sound, if you word it right, your opinion can be waved around like a big, thick, rock-hard flesh cudgel.
Just be careful of what kind of opinion you're using.