It i named the very first time that Adam knew His wife and she conceived and bore Cain. Why you wish to ignore that and come up with an unbiblical statement that someone other than Adam was his father is beyond me, but you are certainly entitled to your opinion. All that is asked is that you state where in the bible that it states that. What is vague, unsubstantiated, ambiguous and flat out not stated at all is that someone else is his father. Where does it
explicitly state that someone else was his father?? The where does it explicitly state that Abel knew Eve and she conceived and bore Abel? Where is Abels' name in the genealogy? Who is the firstborn son of Adam?---you say it is not Cain---the bible does not state what you want for Abel.
Gen_4:25 And Adam knew his wife again; and she bare a son, and called his name Seth:
Who is the father of Seth???
Gen_5:8 And all the days of Seth were nine hundred and twelve years: and he died.
Luk_3:38 Which was the son of Enos, which was the son of Seth, which was the son of Adam, which was the son of God. No mention of Abel being his son.
The genealogy does not include Cain nor Abel. The firstborn and inheritor was Cain, he lost that when he killed Abel, he was no longer in the genealogy. God expelled him from the family. Seth became the firstborn because Abel was dead. If Cain, had died--the firstborn inheritor would have been Abel, and that above genealogy would have had Abels', name, not Seths'.
The genealogy of Christ is traced to David--the prophecies in the OT of a messiah was to come from King David. The Messiah promise was to the son of David.
Mat 1:17 So all the generations from Abraham to David are fourteen generations; and from David until the carrying away into Babylon are fourteen generations; and from the carrying away into Babylon unto Christ are fourteen generations.
In Luke 3 the genealogy goes to Adam. And it goes from Seth to Adam. There is no mention of Abel--just as there is no mention of Cain---neither were able to be called firstborn inheritor anymore.
Prophecies of Jesus Old Testament
Scripture New Testament
Fulfillment
1 Messiah would be born of a woman. Genesis 3:15 Matthew 1:20
Galatians 4:4
2 Messiah would be born in
Bethlehem. Micah 5:2 Matthew 2:1
Luke 2:4-6
3 Messiah would be
born of a virgin. Isaiah 7:14 Matthew 1:22-23
Luke 1:26-31
4 Messiah would come from the line of
Abraham. Genesis 12:3
Genesis 22:18 Matthew 1:1
Romans 9:5
5 Messiah would be a descendant of
Isaac. Genesis 17:19
Genesis 21:12 Luke 3:34
6 Messiah would be a descendant of Jacob. Numbers 24:17 Matthew 1:2
7 Messiah would come from the tribe of Judah. Genesis 49:10 Luke 3:33
Hebrews 7:14
8 Messiah would be heir to
King David's throne. 2 Samuel 7:12-13
Isaiah 9:7 Luke 1:32-33
Romans 1:3
9 Messiah's throne will be anointed and eternal. Psalm 45:6-7
Daniel 2:44 Luke 1:33
Hebrews 1:8-12
10 Messiah would be called
Immanuel. Isaiah 7:14 Matthew 1:23
11 Messiah would spend a season in
Egypt. Hosea 11:1 Matthew 2:14-15
12 A massacre of children would happen at Messiah's birthplace. Jeremiah 31:15 Matthew 2:16-18
13 A messenger would prepare the way for Messiah Isaiah 40:3-5 Luke 3:3-6
14 Messiah would be rejected by his own people. Psalm 69:8
Isaiah 53:3 John 1:11
John 7:5
15 Messiah would be a prophet. Deuteronomy 18:15 Acts 3:20-22
16 Messiah would be preceded by
Elijah. Malachi 4:5-6 Matthew 11:13-14
17 Messiah would be declared the
Son of God. Psalm 2:7 Matthew 3:16-17
18 Messiah would be called a Nazarene. Isaiah 11:1 Matthew 2:23
19 Messiah would bring light to
Galilee. Isaiah 9:1-2 Matthew 4:13-16
20 Messiah would speak in
parables. Psalm 78:2-4
Isaiah 6:9-10 Matthew 13:10-15, 34-35
21 Messiah would be sent to heal the brokenhearted. Isaiah 61:1-2 Luke 4:18-19
22 Messiah would be a priest after the order of Melchizedek. Psalm 110:4 Hebrews 5:5-6
23 Messiah would be called King. Psalm 2:6
Zechariah 9:9 Matthew 27:37
Mark 11:7-11
24 Messiah would be praised by little children. Psalm 8:2 Matthew 21:16
25 Messiah would be betrayed. Psalm 41:9
Zechariah 11:12-13 Luke 22:47-48
Matthew 26:14-16
26 Messiah's price money would be used to buy a potter's field. Zechariah 11:12-13 Matthew 27:9-10
27 Messiah would be falsely accused. Psalm 35:11 Mark 14:57-58
28 Messiah would be silent before his accusers. Isaiah 53:7 Mark 15:4-5
29 Messiah would be spat upon and struck. Isaiah 50:6 Matthew 26:67
30 Messiah would be hated without cause. Psalm 35:19
Psalm 69:4 John 15:24-25
31 Messiah would be
crucified with criminals. Isaiah 53:12 Matthew 27:38
Mark 15:27-28
32 Messiah would be given vinegar to drink. Psalm 69:21 Matthew 27:34
John 19:28-30
33 Messiah's hands and feet would be pierced. Psalm 22:16
Zechariah 12:10 John 20:25-27
34 Messiah would be mocked and ridiculed. Psalm 22:7-8 Luke 23:35
35 Soldiers would gamble for Messiah's garments. Psalm 22:18 Luke 23:34
Matthew 27:35-36
36 Messiah's bones would not be broken. Exodus 12:46
Psalm 34:20 John 19:33-36
37 Messiah would be forsaken by God. Psalm 22:1 Matthew 27:46
38 Messiah would pray for his enemies. Psalm 109:4 Luke 23:34
39 Soldiers would pierce Messiah's side. Zechariah 12:10 John 19:34
40 Messiah would be buried with the rich. Isaiah 53:9 Matthew 27:57-60
41 Messiah would
resurrect from the dead. Psalm 16:10
Psalm 49:15 Matthew 28:2-7
Acts 2:22-32
42 Messiah would
ascend to heaven. Psalm 24:7-10 Mark 16:19
Luke 24:51
43 Messiah would be seated at God's right hand. Psalm 68:18
Psalm 110:1 Mark 16:19
Matthew 22:44
44 Messiah would be a
sacrifice for sin. Isaiah 53:5-12 Romans 5:6-8
Not one prophecy said anything about Jesus being a son of Adam---that is understood as Adam is the first man. Nothing stated about a pure line of descent from Adam---only from David, and from Abraham. Luke traces it to Adam. Again---if Cain had died---the genealogy would have gone from Adam to Abel.
If Cain had not murdered Abel----the genealogy would have read from Adam to Cain to Jesus and He still would have fulfilled all the prophecies pertaining to Him.