On the other hand, there is indeed a sense in which bad theology can land someone in hell. The fact that this statement may sound off-putting is evidence of our unhelpful separation of theology and spirituality, or between the knowledge of God and our moral standing.
We tend to think of theology as something purely ‘theoretical’ or distanced from real life, but in Scripture, knowledge of God (or lack thereof) is a moral matter. According to the apostle Paul, creation testifies to God’s eternal power and deity so plainly and powerfully that those who deny him aren’t merely lacking information.
Rather, they “suppress the truth by their wickedness” (Rom. 1:18-23, NIV). They have every reason to recognize God’s sovereign lordship and abundant provision for creation, but they are, as Paul says in Ephesians, “darkened in their understanding and separated from the life of God” (Eph. 4:18; cf. Acts 14:17).