Have you never read John8:43-47 when you read these verses pay attention to Verse 44 and 47.
What about John8:43-47?. these are not physical biological children of the devil. they are "EVIL" just like their father the devil. Evil is abstract, and not concrete. so the biological angle is "OUT". it's who you OBEY will determine if you're a "SON" of God or the devil.
verse 44 tell us why he is describe as their father, a. "the lusts of your father ye will do". and b. "He was a murderer from the beginning". c. "and abode not in the truth", and d. "When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it". and if one speak a lie, then you become his son of that lie.
People, people, one need to understand what is a simile or a metaphor is.
a metaphor: a figure of speech in which a word or phrase is
applied to an object or action to which it is not literally applicable. Example "he or she
is a snake in the grass". not a literal snake, the
action is a deceiver, Laying wait to strike to to inject poison. scripture, Luke 11:53 "And as he said these things unto them, the scribes and the Pharisees began to urge him vehemently, and to provoke him to speak of many things: 54
Laying wait for him, and seeking to catch something out of his mouth, that they might accuse him".
a simile: a figure of speech involving the comparison of one thing with another thing of a different kind, used to make a description more emphatic or vivid. example, 1 Peter 5:8 "Be sober, be vigilant; because your adversary the devil,
as a roaring lion, walketh about, seeking whom he may devour".
as is the key yo understanding this verse.