When Jude talks about those who cause divisions (verse 19) he is literally saying that these are people who draw lines. The intent is to create enemies out of people who once happily coexisted. These dividers misuse Scripture to dupe gullible Christians into becoming fanatical about extra-biblical preferences. Churches must not be laboratories for such preferences. If the Bible is silent on an issue, we should be too, or at least speak with muffled confidence.