No a fact can only be 'true'.
An opinion that ignores 'facts' is false, to argue a false opinion is based on fallacius reasoning. This is standard language and rules of debate...
http://nizkor.org/features/fallacies/
For a good list of the various fallacies in reasoning.
Beyond that facts can be true or false, depending on if the facts support the premise.
Opinion does not = fact.
Hell you can choose to believe that 1 + 1 = 5, natural oceans on earth are made of chocolate, and lakes of beer, but that that doesn't make your opinion valid! Some might think you are stupid or insane? Only the ones who believe 1 + 1 = 2, natural oceans and lakes on earth are made out of water (H20) would have factual opinions. Now that's not to say someone could out there could go and make a chocolate lake, and rivers of beer... But that's obviously not natural.
You have no idea what a 'fascist' is... Actually 'fascists' and 'communists' both decide what the population believes, for them. They don't allow 'discussion' of alternative government or economic viewpoints. Orwell was critical of both.
The difference is in a debate, you point out fallacious reasoning, and then work on opinions that are based around and supported by 'facts'. Thus for example, Quest For Glory: Shadows of Darkness is QFG4 according to Sierra, that is a fact.
The opinion that QFG:SOD sucks monkey nuts, or does not suck is just an opinion, of the type that can neither be fact or fiction, as that much is subjective. Both viewpoints are valid, and cannot be 'proven false or true'.