Actually... the book that the film was based on is widely considered to be accurate. Of course other people are going to say that it was inaccurate because they want to keep their jobs. The people who claimed that the book was inaccurate did not even offer any proof, but just said "it is a lie!" If you really want to go down that road, Sarah Palin's autobiography has been challenged many times with verifiable proof by the AP and other reputable news sources.
Sarah Palin does not represent unity, unless you mean the unity of conservative, Southern WASPS. She has said hateful things about LGBT, minorities, and people of other religion.
Frankly, she is a gun-toting numskull and the fact that she gets any publicity shows how sad America is... I say this as an American passport holder.