Many Christians do NOT think of the greater part of the Bible as history, aside from some stuff about various military campaigns and kings of the Israelites and some specific incidents in Jesus' life...they they of it primarily as allegory, as spiritual parables, with the purpose being to clarify spiritual concepts such as forgiveness, redemption, kindness, brotherhood, honesty, etc. There are also many Christians who do not believe by any means that every single world in the Bible is the literal word of God, but that it's a collection of varied ancient writings with considerable spiritual significance, written by a very large variety of people, some of whom got most of what they said right, some of whom got part of what they said right, some of whom got part of what they said wrong, some of whom were caught up in contemporary political stuff that badly twisted what they said.

There are a vast number of different viewpoints on this among Christians, but this is overlooked by people who would prefer Christians to all just be literal fundamentalists, just because that makes them easier to denigrate and ridicule if you happen to want to denigrate and ridicule them.

This variety of differing viewpoints is also true of Muslims. They're not all literal-minded fundamentalists either. There are genuine progressives and mystics in both religions who do not believe the fundamentalist stuff that the anti-religionists are so fond of deriding.

It's easier, if you already have a deep and abiding prejudice, to just insist that everyone you're prejudiced against shares a simple set of easy-to-attack absurdities...but in doing so, all you're doing is some very lazy thinking and wish-fulfillment...kind of like Hitler did, for example, with regard to Jews....or like the Inquisition did with regard to the wretched and innocent people they accused of witchcraft. You're engaging in a modern witchhunt of your own choosing, not any kind of fair attempt to understand a viewpoint other than your own.