Why Do Churchgoers Need to Be Warned and Educated About the Dangers of Biblical Criticism?

Higher critics have taught that much of the Bible was composed of legend and myth, that Moses did not write the first five books of the Bible, 8th century Isaiah did not write Isaiah, there were three authors of Isaiah, 6th century Daniel did not write Daniel, it was penned in the 2nd century BCE. Higher critics have taught that Jesus did not say all that he said in his Sermon on the Mount and that Jesus did not condemn the Pharisees in Matthew 23, as this was Matthew because he hated the Jews. These are just highlights for there are