Jude says it is these people who cause divisions and are “worldly people, devoid of the Spirit” Jude 1:19. The phrase is part of his description of their character and divisive impact Jude 1:19.
Jude shifts from exposing disruptive people to strengthening his readers. He urges the “beloved” to remember what the apostles already warned: scoffers would come, driven by ungodly desires, and would splinter the community. These verses sit near the end of Jude’s short letter and function as a turning point from description to response. Earlier, Jude warns that certain people have slipped in and are damaging the community (compare the earlier framing in Jude 1:4).
Jude turns from describing the disruptive people to strengthening the “beloved” community.
A common mistake is to turn the wording into a slogan. The better reading keeps the phrase tied to the passage, the speaker, and the problem the book is addressing.
Start with Jude 1:19, then read the surrounding section so the answer stays connected to the passage's flow.
19These are they who cause divisions, and are sensual, not having the Spirit.