How do you view the Bible? As authoritative and the only source of truth or as something else? Take a listen to what pretenders do with truth and other character qualities of theirs.
God is not okay with people just living however they want to. Jude gives a warning and some reminders of what God has done in the past and how consequences are eternal.
Are you someone who would be called a contender? What are you contending for? What does it mean to contend for the faith?