Not sure where you got 80 years after the fact, when most date the gospel of Matthew at between 60-80 AD.
As for someone having a bad dream or a premonition and then acting on that bad dream/premonition...that doesn’t sound too far outside the realm of human nature to me. You aren’t trying to say that people don’t do that, are you?
But to the real question: You do believe that the Book of Matthew and indeed all the books of the bible are the divinely inspired word of God, right? You do believe this, right?
No, not at all. It’s a collection of songs, speeches, lists, stories, legends, poems, and letters from a long-ago culture cobbled together by the Catholic church, edited and re-edited, which now exists as a relic that some people like to comb through looking for mystical signs to make their lives more interesting.