Christians are wrong when combining the Gospels into 1 single narrative.

When Christians talk of the Gospel, they combine all 4 into 1 narrative when they discuss it. This is problematic because there are clear contradictions among the four, and instead of acknowledging the contradictions, they'll explain them away by saying they're all true, and one story. In reality, they're contradicting versions of the same story written by different authors who have varying beliefs about what occurred.

A clear example of this is there being two different lineages of Jesus. The Gospel of Matthew and Luke have differences, such as Joseph's Father being different in both Gospels. It leads to the more likely answer, that both of these lineages are wrong, and are not historical.

There are many more examples but I don't want this post to go on too long.