Fabrizio was acting on behalf of Barzini who wanted Michael dead. I believe it was because he was jealous of Michael for marrying Apollonia, and desperate to go to America. Emilio Barzini bribed him to place the bomb with the promise of a new life in the US (and presumably a fair bit of money).
Fabrizio betrays Michael by setting up explosives in his car, but kills his new bride instead. In the novel, Fabrizio is later shot dead in revenge for the killing. A scene was filmed of him being killed by the Corleones using a car bomb but was cut from the motion picture before its theatrical release.
Fabrizio was a Sicilian shepherd who worked for Don Tommasino, acting as a bodyguard.
Fabrizio was a Sicilian shepherd and bodyguard working for Don Tommasino, and old friend of Vito Corleone. After Michael Corleone killed Virgil Sollozzo and Mark McCluskey in 1946 he went into hiding in Sicily near the village of Corleone under the protection of Don Tommasino.
One of the strangest unresolved storylines from The Godfather franchise is why Michael never sought revenge on Fabrizio, the man who killed his first wife Apollonia. A key subplot in the original Godfather sees Michael (Al Pacino) gunning down drug baron Sollozzo in retaliation for an attempt on his father Vito's life.
Michael's Marriage To Apollonia Was About Power
Understandably, without a strict adherence to power, there can be no Michael Corleone. His role is entirely suited to holding and maintaining power over every aspect of the Corleone crime family.
Michael has become a true Corleone (embracing both Italian culture and mob affiliation), and his marriage to Apollonia signifies Michael's official acceptance of this change and what it means for his future.
While in Havana negotiating with Roth, Michael discovers that Fredo is the family traitor behind the assassination attempt on him. After telling Michael that he has never met Ola, Fredo later carelessly tells Geary that he had been to a nightclub with Ola.
Even people who aren't familiar with the film can recognise Marlon Brando's weary, wheezy Mafia boss, Vito Corleone, and his favourite son Michael, played by Al Pacino.
In the movie Kay does not know. In the book Kay does not know. After Michael is back for six months, Kay calls his mother. His mother instigates the reunion by having Kay come out to Long Island and paying for the cab ride.
In The Godfather (1972 film), what would happen if Apollonia was not killed and returned to America with Michael as his wife? He still would have become the Don of the family. He'd retain the same character he had before he left, and would not have become a hardened person since Apollonia is still alive.
When Michael Corleone fled to Sicily to escape the American authorities, Calò and his friend Fabrizio were assigned to protect Michael. The three developed a close bond of friendship until Fabrizio betrayed Michael, attempting to kill him in an explosion that claimed the life of Michael's wife Apollonia.
While his death wasn't shown onscreen in any of The Godfather movies, it's safe to assume Michael eventually did track Fabrizio down and had him killed offscreen. Despite sprawling runtimes, all three movies still featured a substantial amount of cut footage.
In The Godfather II, Vito Corleone chooses his younger son, Michael, instead of his older son, Fredo, as his successor. This decision is based on Michael's intelligence and ability. Fredo, who is considered weak, is dismissed to do more menial tasks for the family.
Paulie has seemingly betrayed Vito—and thus the family—by selling him out. In The Godfather, this kind of betrayal is the worst of all sins.
The Godfather's Michael Corleone may have loved many things, but his first wife Apollonia wasn't one of them. The pair were wed in Sicily in the mid-stages of the groundbreaking 1972 Francis Ford Coppola film, not long after Michael took refuge there after murdering police captain McCluskey and Virgil Sollozzo.
Apollonia had a loving marriage with Michael, albeit a very short one. She had also taken some traits that her parents had worried about in the first place; that she was beginning to distance herself from her Sicilian roots.
Apollonia is the passion of his youth, she's young, beautiful and devoted forever—she died young, leaving a good looking corpse—while Kay and Michael age and become... friends. His love for Apollonia is hot, but his love for Kay is deep. She challenges him.
Roth secretly plans to assassinate Michael, partly to avenge Moe Greene's murder (as depicted in The Godfather). Roth instructs Ola to befriend Michael's brother Fredo, who provides Ola (and Roth) information about Michael that enables them to make an attempt on his life.
While Tom Hagen initially suspected Clemenza of being the one who would betray Michael to Don Emilio Barzini's alliance, Michael reasoned that the more cunning Tessio was the culprit. Clemenza's strongest attribute to the Corleones was his stubborn loyalty, not his intelligence.
Because Fredo remained a threat to his family. As long as Fredo was bitter about being stepped over, and he always would be, he was a threat. Michael triumphed over his enemies because he was cold, ruthless and logical.
Yes. NB: Unlike other answers so far, this answer is according to the novel. Michael did indeed love Kay. It was not the overwhelming passion he had felt for Apollonia, but it was love just the same.
The tragedy for Michael is that he couldn't escape the inevitable doom of succession, despite his prior knowledge. Based on Mario Puzo's 1969 novel of the same name - The Godfather (1972), is considered as one of the greatest films of all time.
Kay is increasingly repulsed by Michael's criminal life, particularly the fact that Michael's button men have become Anthony's playmates. She also fears that if the baby turns out to be another son, it will tie them to the Mafia forever. During Michael's trip to Cuba, Kay decides to leave Michael for good.