What the Danites did was commit genocide and put God's name on it. The Crusades are obviously one example. But there are examples closer to home. The honor and glory of God, whose name we bear, is at stake. We cause the unbelieving world to laugh and mock God.
False salvations require false gods.
The god of our imaginations will not judge us but cannot save us either. Dan would eventually be vomited out of the land because of their sins, for that is the punishment of idolatry. This warning does apply to us. God asks us to believe His promises and live by them, to believe that Jesus came from Heaven, died on the cross, and rose from the dead so that those who place their trust in Him will live forever. Consider your own position.