An opinion is a judgment, viewpoint, or statement that is not conclusive, like "Baldi is a good character" and "Papa Louie games are shit", rather than stating information, like "Apples are fruits" and "Bananas are rocks", which are either true or false statements. So an opinion can be neither right nor wrong.
That's still an opinion that's neither true or false, because that's what someone may personally think of Hilter. A judgement, viewpoint, or statement doesn't need to be agreed with the majority of people to be a opinion.
What's the difference between an opinion and a fact if you think they can both be true or false? Stop acting so smart just because someone's opinion on something doesn't align with yours.