Here is a 3min 19 second video that gives imo a less biased analysis of the accuracy of the New Testament and how important the mistakes are.
How important are the 5-10% of the textual variances in the NT? Some of them are giants! Here are a few examples:
1) Is the doctrine of the Trinity found in 1 John 5:7-8? It depends on which manuscript you read.
2) Did Jesus appear to any of his followers after the resurrection in the book of Mark? It depends on which manuscript you read. None of the earliest manuscripts have any appearances. The last 12 verses of the book of Mark (16:9-20) were inserted by later scribes who were disappointed that the apostles didn’t encounter Jesus following his resurrection according to this account.
3) Was Jesus so distressed in the Garden of Gethsemane that he sweats blood? It depends on which manuscript you read. Some later scribes were concerned that Jesus showed little passion in Luke’s Passion Narrative so they inserted into the Garden prayer a scene where Jesus sweated blood. (Luke 22:43-44)
4) In the Book of Luke, did Jesus say to God that the Jews should be forgiven? Did Jesus request, “Father, forgive them for they know not what they do” (Luke 23:34)? It depends on which manuscript you read. Early Christians interpreted this as a prayer of forgiveness for the Jews, ignorant of what they had done. No wonder some scribes deliberately deleted the verse in the second and third centuries, when many Christians believed that Jews knew exactly what they were doing and that God had in no way forgiven them.
5) Did Jesus have an encounter with an adulterous woman and her accusers in which he told them, “Let the one without sin among you be the first to cast a stone at her,” and in which he told her after all her accusers had left, “Neither do I condemn you. Go and sin no more”? It depends on which manuscripts of John you read in chapters 7-8! The oldest manuscripts don’t have it. It was added later.
6) Did Luke understand that Jesus’ death was an atonement for sin? It depends on what you do with Luke 22:19– 20. Everywhere else in Luke and Acts, the author eliminated Mark’s references to Jesus’ death as an atonement. The only remnant of that teaching is in some manuscripts of the Lord’s Supper, where Jesus says that the bread is his body to be broken “for you” and the cup is his blood poured out “for you.” But in the earliest and best manuscripts, these words are missing (much of v. 19 and all of v. 20). Scribes have added them to make Luke’s view of Jesus’ death conform to Mark’s and Matthew’s. In other words, Luke disagreed with Mark and Matthew on one of the most important theological claims of the other gospels and Paul.
This variant questions whether Luke (whoever he was) believed that Jesus dies as a sacrifice for sin. It is not that Luke didn’t think that Jesus’ death was important. But he believed that if you think about Jesus’ death, you will repent. Thus, according to Luke, it is the repentance, NOT the sacrificial death of Jesus that atoned for sin. Meaning, without that later scribe addition, the author of Luke and Acts did not believe that Jesus died as an atoning sacrifice for your sins! Anyone would say that these variances are terrifically important for knowing what traditions about Jesus were in circulation among the early Christians.
7) After his resurrection, did Jesus tell his disciples that those who came to believe in him would be able to handle snakes and drink deadly poison without being harmed? It depends on which manuscripts of Mark you read.
8) Paul’s injunction to women to be “silent” in the churches and “subordinate” to their husbands was not originally part of 1 Corinthians 14:34– 35, but was added by later scribes intent on keeping women in their place. Is that a significant error or not?