Why is a good omen a traitor in Europe and America?

The good sign is that the traitors in Europe and America are because of the plot content. "Good omen" tells the story of the angel Raphael and the devil Crowley who existed at the beginning of the creation, in order to continue to live in this world, and jointly fight against the son of Satan. It does not conform to the style of European and American movies, so it is called a traitor in the European and American circles by netizens.