"The Jazz Singer" has so many things wrong with it that a review threatens to become a list. Let me start with the most obvious: This movie is about a man who is at least 20 years too old for such things to be happening to him. "The Jazz Singer" looks ridiculous giving us Neil Diamond going through an adolescent crisis.
The movie is a remake, of course, of Al Jolson's 1927 "The Jazz Singer," which was the first commercially successful talking picture. The remake has played with time in an interesting way: It sets the story in the present, but it places the characters in some kind of time warp. Their behavior seems decades out of date, and some scenes are totally inexplicable in any context.
For example: In the film, Diamond plays a young Jewish cantor at his father's synagogue. He is married, he has apparently settled down to a lifetime of religion. But he also writes songs for a black group-and when one of the quartet gets sick, Diamond takes his place, appearing in a black nightclub in blackface. Oh yeah? This scene is probably supposed to be homage to Jolson's blackface performance of "Mammy" in the original, but what it does in 1980 is get the movie off to an unintentionally hilarious start.
The bulk of the movie concerns Diamond's decision to leave New York, his father and his wife and go to Los Angeles, where he hopes to break into the music industry. This whole business of leaving the nest, of breaking the ties with his father, seems so strange in a middle-aged character: Diamond is just too old to play these scenes. But no matter; the movie is ridiculous for lots of other reasons.