Henry Morris writes:
...[T]he notion that God is merely a kindly grandfather figure is a self-serving figment of man’s sinful imagination. The New Testament reminds us that “our God is a consuming fire” and “the wages of sin is death” (Hebrews 12:29; Romans 6:23), and God doesn’t change. “The Lord Jesus shall be revealed from heaven with his mighty angels, In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ” (2 Thessalonians 1:7-8).
Listen: The Lie That God Is More Tolerant Than He Used To Be by Erwin Lutzer Part 1 / Part 2 - Running to Win