The Merit of our Forefathers
We often pray to God to consider the "merit of our forefathers". So, let's grant that our forefathers were really in good graces with God, how does that help us? I don't think it is some kind of genetic consideration. And everyone knows that wonderful people can have terrible kids and terrible people can have wonderful kids, so why would the behavior of people that lived millenia before us have any influence on how God should judge us?
To me it smacks of the nepotistic, cosa nostra like Middle Eastern mentality. You do me a favor because we are family. Yo, Luigi.