Rebellion has consequences.
God’s anger is not just an emotional reaction. It is his fair and just response to sin (John 3:36; Romans 1:18; 1 Thessalonians 2:16).
God's promise (see Hebrews 6:13–20; 7:20–22, 28) was that they would never enter Canaan, the land of rest from their travels (Deuteronomy 1:19–46; 3:20; 12:10; Joshua 1:13).