Why would the Bible describe the children of regular human matings as “nephilim”, the same word it uses to describe the Philistine giants? It seems obvious there was something more unusual about the pairings if the writer of Genesis found it noteworthy, thought it important to mention the unusual offspring produced by them, and noted both of those immediately preceding the decision of God to wipe out the wicked men from the earth with a flood.
What typically happens to people who are children of Christians and atheists or Muslims?
They are neither believers or non-believers. They open mindedly accept things and reject things without being able to figure out why it should be accepted or rejected.