The End of the World in the Book of Matthew

It's well known that the christian community in jerusalem did flee the jewish war, taking up residence in the jordanian settlement of pelop. So why would matthew preserve this exhortation for jewish christians to pray that their flight not take place in the winter or on a sabbath when travel would be difficult? If their flight had already occurred and the need to no longer existed, we would expect him to drop that out. Furthermore, after talking about the destruction of the temple, matthew has jesus giving a series of parables about the end of the world,. mostly in matthew 25. That could lead some readers to mistakenly think that end