Why are other civilizations ignored in the Bible?

[discipulus]

You are right they don't all match up. Each writer recorded certain specific details of Jesus' life and each writer, though inspired, retained their own individual and unique style of writing. Each gospel writer was inspired to portray Jesus in a particular light. For example, Matthew's style was geared more towards a Jewish audience while John was writing of Jesus as the Logos, or The Word of God. John focuses on the divinity of Christ while Luke emphasizes His humanity.

When taken as a whole we have more of a complete picture than what we would have if we were to take them individually.

News reporters covering the 9/11 terrorist attack on the WTC, though reporting on one terrorist attack, each recorded different things depending on their vantage point. Taken together the accounts of the reporters provide us with a more complete picture of the attack.

The gospel accounts, though differing in certain respects, never contradict one another.

Yes they contradict each other. That's what I meant about the accounts not matching up. It's not just telling the same story from different perspectives. It's telling stories with important details being different from each other.

Accounts may not match up. That does not mean they contradict each other. A contradiction would be:

Matthew saying "Jesus was crucified by Himself" and Luke saying "Jesus was crucified with two thieves".

That would be a contradiction.

Matthew could say "Jesus was crucified with two thieves" and Luke could say that "Jesus was crucified".

That is not a contradiction. Luke not mentioning the two thieves is him not mentioning the two thieves. That is it.

Of course I used those as examples and in no way intend for them to accurately represent scripture.