Question

why does the father wish to build a relationship with the son​

Answer 1

The father wanted to start afresh with his son, he wished that both he and his son should reach out an empty hand towards each other without old baggage. In such a situation, they would come to each other without their preconceived notions or attach any conditions to their reunion. The stress was on choosing to forgive and forget rather than holding on to past grudges. The new relationship that the father wanted to build would be based on respect for each other's differences and accommodative of different ways of looking at life that father and son had.