I don't even know how you claim the 'Gospels' as an 'eyewitness account' while
nobody really knows for sure who wrote them and where and also since
the originals don't exist. So how can you trust an anonymous author to write an accurate account of events that happened centuries before ?
That is not 'eye witness' account under any standard.
From :
Gospel of Mark - Wikipedia, the free encyclopedia
"The Gospel According to Mark does not name its author.[2] A 2nd century tradition ascribes it to Mark the Evangelist (also known as John Mark), the companion of Peter,[7] on
whose memories it is supposedly based.[1][8][9][10] but the author's use of varied sources tells against the traditional account and
according to the majority view the author is unknown.
From:
Gospel of Matthew - Wikipedia, the free encyclopedia
"
The Gospel of Matthew does not name its author. The Christian bishop, Papias of Hierapolis, about 100–140 AD, in a passage with several ambiguous phrases, wrote: "Matthew collected the oracles (logia—sayings of or about Jesus) in the Hebrew language (Hebraïdi dialektōi—perhaps alternatively "Hebrew style") and each one interpreted (hērmēneusen—or "translated") them as best he could."[4] On the surface this implies that Matthew was written in Hebrew and translated into Greek, but Matthew's Greek "reveals none of the telltale marks of a translation."
They don't even know for sure which language Matthew was written in.
From:
Gospel of Luke - Wikipedia, the free encyclopedia
"Although the Gospel survives in
anonymous form, it is considered that the name was known to the addressee, Theophilus.[38] The author was probably a Gentile Christian.[13] "
"Most modern scholars agree that
Luke used the Gospel of Mark as one of his sources.[29] The understanding that Mark was the first of the synoptic gospels and that it served as a source for Matthew and Luke is foundational to modern critical scholarship."
Again the supposed Gospel of Luke is also a copy of a material with unknown source(Mark).
From:
Gospel of John - Wikipedia, the free encyclopedia
"The gospel identifies its author as "the disciple whom Jesus loved." The text does not actually name this disciple, but
by the beginning of the 2nd century a tradition began to form which identified him with John the Apostle, one of the Twelve (Jesus's innermost circle).
Today the majority of scholars do not believe that John or any other eyewitness wrote it,[12][13][14][15][16][17] and trace it instead to a "Johannine community" which traced its traditions to John; the gospel itself shows signs of having been composed in three "layers", reaching its final form about 90-100 AD."
And these are your eyewitness accounts ? Now compare that to the real 'eyewitness account' of the scriptures of Islam.
Qur'an - the eyewitnesses (companions of the Prophet Muhammad(pbuh)) wrote and memorized it as the Qur'an was being revealed over 23 years of Prophet's(pbuh) life and then passed down in the original language generations after generations.
Hadith - eyewitness account of events with unbroken chain of reporters going all the way back to Prophet Muhammad(pbuh)
That's what you call verifiable eyewitness account.
Now if you question the method of revelation from God to Prophet Muhammad(pbuh) via angel Gabriel, the entire story of Jesus's(pbuh) birth in the Bible will come crushing down. Why ?
" 26 In the sixth month of Elizabeth’s pregnancy,
God sent the angel Gabriel to Nazareth, a town in Galilee, 27
to a virgin pledged to be married to a man named Joseph, a descendant of David.
The virgin’s name was Mary. 28 The angel went to her and said, “Greetings, you who are highly favored! The Lord is with you.”
29 Mary was greatly troubled at his words and wondered what kind of greeting this might be. 30 But the angel said to her, “Do not be afraid, Mary; you have found favor with God. 31 You will conceive and give birth to a son, and you are to call him Jesus" (Luke 1:26-31)
Luke 1:26-38 NIV - The Birth of Jesus Foretold - In the - Bible Gateway
See the above verses ?
It is no different than the story of how angel Gabriel came to Prophet Muhammad(pbuh) and how he was troubled by this unusual experience at first.
You want more stories of Angel Gabriel and prophets in the Bible ? Here it is :
"11
Then an angel of the Lord appeared to him, standing at the right side of the altar of incense. 12
When Zechariah saw him, he was startled and was gripped with fear. 13 But the angel said to him: “Do not be afraid, Zechariah; your prayer has been heard. Your wife Elizabeth will bear you a son, and you are to call him John." (Luke 1:11-13)
Luke 1 NIV - Introduction - Many have undertaken to - Bible Gateway
Again, you see that's how God sent messages to the Messengers. So in order for you to reject Prophet Muhammad's story of getting revelation via Angel Gabriel, you have to reject all those other stories in the Bible as well.