I'm always amused when someone says they can "debunk" an entire religion with a few facts.
You are debunking one premise, not the core teaching, which is that Jesus is Savior and died for our sins.
Let's talk about "the first man."
Genesis
2 &
3 talk about Adam and Eve. Genesis 4 talks about Cain killing Abel, and being driven out. But hold up.
Genesis 4:16-19
Several other families are mentioned. Several other WOMEN come out of nowhere to marry Enoch, Cain, and so on.
Where did these people come from? Obviously, they weren't the first man and woman. They were an archetypal man and woman. First, as in being truest to a model, not first in chronology. Lemme explain. The Bible also mentions the "first fruits" meaning very best ones. Adam and Eve, were there to explain "
why are humans like they are? Why do they call things 'good' and 'evil' instead of just 'okay'? Why do we try to do stuff, screw up, and hate ourselves? Why are we male and female? Why are we physical creatures, not spirits flying around?" Stuff like that.
Debunks Christianity indeed. Why does it matter if 77 generations or 777 generations of people were there? First, this is being super-literal missing the actual point of two different religions. Second, if Jesus is both God and Man, as we learned in church, trying to pin a "birth date" on him is completely stupid. John 1 says, "
1In the beginning was the Word, and the Word was with God, and the Word was God.
2He was with God in the beginning." And just to drive home that the Word is Jesus, it says, "
14The Word became flesh and made His dwelling among us. We have seen His glory, the glory of the one and only Son from the Father, full of grace and truth."
How can an immortal Son of God have a specific date of birth? Answer: he can't. Jesus has always been with us.
Jesus in comparative mythology - Wikipedia
-Mithra
-Buddha
-Tammuz
-Osiris
-Etc
-Hell, he is STILL appearing in mythic figures like Luke Skywalker (until the Last Jedi, mrgrgrgr...) and Superman
The many faces of Jesus from an Jungian view
Jesus comes to preach to us, and to be with us. Not just circa 0 A.D. but since the very beginning. And Jesus will be there at our end too. You claim so much, yet understand so little, about what Christ is really about. Maybe there was a Jesus at around this date. But if there weren't, if the genealogy is off, this does literally nothing to disprove Christianity.
C.S. Lewis in fact warns about obsessing about the "
historical Jesus" in the
Screwtape Letters. To put Jesus into a historical era is to fail to understand the divinity of Jesus.
If you want to attack Christianity, you'll have to prove that Jesus isn't a Savior.