I've noticed several Jews conservatives considered the movie antisemitic. They are Mona Charen, William Saffire, and Charles Krauthammer. They seem to see blame for Jesus' death attached to all Jews while Christian reviewers have tended to seem blame either the high priests and Romans or all mankind.
I haven't seen the movie yet, but most of the reviews I've heard don't consider it antisemitic. I've heard that the violence is rather grusome and that perhaps Jesus as depicted in this move shed more blood than a human body has. I've also heard that if you didn't know much about Christianity and the New Testament it would be difficult to understand why anyone was mad enough at Jesus to subject him to the punishment he received. There just wasn't much information about what had occured prior to the last 12 hours of Jesus life. Perhaps Mel Gibson is saving that for other movies.