In the original 1976 film, Father Brennan said he was present during Damien's birth, that he was born in a hospital, and is said to have a 666 mark on his thigh suggesting he is also part of the cult. In this film, none of those things seem to be true. He appears to be trying to bring down the cult and does not appear to be present when Damien is born, not did Damien appear to be born in a hospital.
When Margaret goes to Father Brennan's apartment, he must unlock a well-bolted door. The top lock (a door chain) is fitted incorrectly allowing the chain to easily slip out the hole.
The fashion used by the supporting characters, as well as the extras in the film, do not belong to the early seventies, but to the middle of that decade.
When Margaret and Luz go to the disco together, the first song heard playing is "Rumore" by Italian singer Raffaella Carra is heard. The song was not released until 1974, though the film is set in 1971.
The song "Daddy Cool" by the group Boney M. is heard in the disco scene. This song was released in 1976 and the film is set in 1971.
During the disco/bar scene, the second song heard playing is "Domani" by Raffaella Carra. The song was not released until 1980, but the film is set in 1971.
During the disco scene, where Margaret goes to dance with Paulo, the song playing is "I've Got To Use My Imagination" by Gladys Knight and the Pips. The song was not released until 1973, but the film is set in 1971.
WRONG: It's said that ambassador to Great Britain would need a newly born kid, but in The Omen (1976), Robert Thorn is appointed as ambassador to Great Britain after adopting Damien.
RIGHT: It is simply wrong what is told here. Gregory Peck in The Omen (1976) aka Robert Thorn is already a American ambassador (in Rome) and was then appointed as the American ambassador in Great Britain. So this is clearly not a plot hole, just someone who did not watch both films carefully and only want to rant.
RIGHT: It is simply wrong what is told here. Gregory Peck in The Omen (1976) aka Robert Thorn is already a American ambassador (in Rome) and was then appointed as the American ambassador in Great Britain. So this is clearly not a plot hole, just someone who did not watch both films carefully and only want to rant.
The explanation that a cult within the Catholic church wants to bring about the coming of the Antichrist in order to counter increasing secularism in the world is a flimsy one. Even if it was an attempt to restore the power the church once had over people by making them believe in God again, which Father Brennan says is the case. But, if they believed in their own teachings, bringing about the Antichrist would simply bring about the end of the world.