Yes and no.
I think there has to be more to it than just someone having a certian opinion before it becomes a philosophy. You also need to have the reasoning behind it, and this reasoning needs to be resonably sound and make an attempt to avoid contianing things like Circular arguments, and contradictory statements.
As for there being no wrong opinions, well I think you will find many people who disagree.
It would be very hard to say that the opinions of Hitler were not wrong. Its possible to say something like, Opinions are only in the mind of the holder, and moral judgments can not be made on them untill they are turned into action, but that is dependant largly upon your own moral views, and can even encompass differnt ideas on what is mind.
A good start though, and something to think about a little more.
1989 DX R I disagree with your statment. Iv found quite a bit of what you've said in here to be deep and thoughtfull.
