You're absolutely right. And in fact, in the movie (due to Jesus' reply while questioning him) Pilate asks his wife what is truth? Then goes on to elaborate his truth, which goes something like this: 'you know what my truth is Claudia? My truth is that Caesar has already advised me that the next insurrection that occurs in my territories will end with my blood being spilled once and for all. What do I do about that truth, Claudia?'
He is portrayed as he is portrayed in the New Testament: strictly a political creature who isn't able to find the fault with Jesus that Caiaphas wants him to.