to hakeem,
Galatians 4.4 does not say Jesus had a human father---it says Jesus was the son of God and a woman.
Galatians 4:4 does not say Jesus did not have a human father for his incarnation from a heavenly Son of God.
Galatians begins by admitting the Pauline Jesus was not a man.
Galatians 1:1
Paul, an apostle, (not of men, neither by man, but by Jesus Christ, and God the Father, who raised him from the dead.
Galatians 1:1 does not say that. Paul wanted to say he was an apostle not chosen/appointed by men. Instead he said he was selected by (then again heavenly) Jesus.
All Christian writings which make reference to the so-called Pauline Epistles admit the Pauline Jesus had no human father, was born of the Holy Ghost or was God Creator.
What are these Christian writings which make reference to the so-called Pauline Epistles?
Anyway, that comes later, so that does not reflect on Paul. Furthermore later Christian writers had to take in account the story of the divine conception in gLuke & gMatthew.
Even so, "Luke" & "Matthew" "admitted" Jesus had a human father (the genealogies).
Furthermore, according to all the gospels and Paul's epistles, Jesus had also brothers.
According to gMark & gMatthew, Jesus had also sisters.
Ignatius, Ireneus, Tertullian, Origen, Hippolytus, Lactantius, Eusebius, Jerome, Clement of Alexandria, Chrysostom and others make references to the Epistles and all admit Jesus had no human father, was born of a Holy Ghost and a Virgin, the Logos or was God Creator.
Again these Christian writers had to take in account what was written in the gospels & 'Hebrews'.
Regardless of when you believe the NT books were written you will not be able to present any corroborative historical evidence that any book in the NT records historical events with respect to Jesus and Paul.
There are corroborative evidence about Jesus/Christ in Tacitus & Josephus' works (Ant. 20).
Of course, with Jesus having been very "minimal", we should not expect a lot of corroborative evidence, and even less for Paul, a sectarian preacher with a small following.
Little (for Jesus) or lack (for Paul) of corroboration does not mean Jesus or Paul did not exist.
Cordially, Bernard.