Nadia is struck and killed by a vehicle, Jacob touches Sayid

In 2005, Sayid and Nadia are walking up the street happily discussing where they should spend their first anniversary. Jacob is standing on the sidewalk behind them as the weight to cross the street. As Nadia enters the street, Jacob asks Sayid for help because he is lost. Nadia turns back to tell Sayid that she found her sunglasses when she is hit by a silver SUV. As Sayid looks it shock as Nadia is struck, Jacob briefly touches his shoulder.

The silver SUV speeds off and another car passes through the intersection as Sayid runs towards Nadia. As Nadia is dying, she says "Take me home" in Arabic multiple times. Sayid grasps her hand with his as she dies.

It would seem that Jacob intervened here to either cause Nadia's death or to keep Sayid from being hit by the vehicle too. What is the significance of the fact that Sayid was touched by Jacob after the Oceanic 6 were rescued and Kate, Sawyer and Jack were visited before the crash of Oceanic 815?