My own thoughts, unsupported by anything but my own experience:
Holy books - all of them - are the ultimate Rorschach test. You see in them what you want to see. The people pushing this want to have an authoritarian, petty, spiteful, vengeful god, and they have one - it's supported by what they choose to read in their book. It's not supported by the parts they choose to skip over, but that's OK, because they're not reading those parts.