John 8:39
They answered and said unto him, Abraham is our father...
If the Jews of Jesus' day were children of a man that lived 2000 years before then We also are the children of All of our fore-fathers.
Exodus 20:12
Honour thy Father and thy Mother : that thy days may be long upon the land which the Lord thy God giveth thee.
So, we are to honour Not Just our immediate Father and Mother but All of our predecessors.
Why?
It as about Authority , continuity, stability and longevity.
To disconnect from progenitors is to be set adrift in Life. The result is waste, Suffering and ultimate shipwreck.
It is Not likely that a person Respects the Authority of God if there is no Respect for parental Authority .
It is Not likely that a Child Will Respect the Authority of the Law of the land if they do Not Respect parental Authority.