To be fair, there's zero expectation in most of Christianity that the entire Bible needs to be read and followed equally. Most Christians follow mostly the New Testament, and particularly the gospels. Some of this stuff in the Old Testament is less often talked about, taught, or even brought up. The stuff they focus on from the Old Testament are lessons about being tested and having faith (like Job) or the "generally love people and be a good person" niceties from books like Psalms.

I'm not defending it. But having grown up in that world, it's not at all like they give the same weight to these crazy verses as they do to the stories about Jesus. It's somewhat disingenuous to mock them simply cause these verses exist. Most don't follow these parts of the bible.