What are the most dangerous threats to the gospel today?

It’s impossible to answer what’s “most” dangerous to the gospel today without God’s knowledge of everything. But here are some prominent threats that loom on the horizon:

1. The prosperity “gospel.” The belief that the gospel is about God making us rich is a lie. Jesus came to save us from sin and reconcile us to God (Rom. 5:10-11; 1 Pet. 3:18), giving us every spiritual blessing (Eph. 1:3) and promising us suffering in this life and glory in the next (Acts 14:22, Rom. 8:18).
2. The attack on penal, substitutionary atonement. Many people reject the idea that on the cross God punished Jesus for the sins of his people. But to reject this is to reject the heart of the gospel itself (Rom. 3:21-26).
3. The rejection of the wrath of God. People today are extremely uncomfortable with the idea of a holy God who will punish sin. But if we reject the wrath of God we lie to ourselves about the fundamental problem the gospel saves us from (John 3:36; Rom. 1:18; 1 Thess. 1:10).
4. The rejection of sin. Some argue that sin is just an idea that people in power use to make others behave the way they want them to. But the Bible presents sin—and especially God’s wrath against sin—as humanity’s fundamental problem. Reject sin and you’ve rejected our only Savior who “died for our sins” (1 Cor. 15:3).
5. A man-centered view of the universe. We like to think that we run things around here. We like to think that no one can tell us what to do or believe—after all, we have rights! But the Bible presents exactly the opposite picture: we live in God’s universe (Rom. 11:36). He made us (Ps. 100:3). He rules over us (Dan. 4:34-35; 1 Tim. 6:15-16). We either worship him or hate him—and face the consequences (Rom. 1:18, 25; 8:5-8). A man-centered view of the universe is the opposite of the gospel and leaves no room for the gospel.
6. “All paths lead to God.” People like to think that whatever anyone believes is fine so long as they’re sincere. People like to think that God will accept everyone in the end. After all, isn’t he a loving God? But the gospel is a radically exclusive message: Jesus alone is the way, the truth, and the life (John 14:6). “Salvation is found in no one else, for there is no other name under heaven given to men by which we must be saved” (Acts 4:12, NIV).
7. Other threats: widespread belief in a brand of “tolerance” which, in fact, is not very tolerant but is fundamentally a rejection of universal truth; cultural materialism; nihilism/philosophical unbelief/radical skepticism; the ever-continual attacks on Scripture, even from within the church.