When God sent his prophets to sinful man, he promised wrath for those who continue in rebellion. If we forget the reality that our God is indeed full of wrath against sin, we will be destroyed.
YHWH is a different sort of God. He cares for those that the rest of the world ignores or abuses. He is the God of Justice.
Humanity dreams of a world of justice and peace, but when the dream is pursued apart from righteousness with God it becomes a nightmare. Christ offers us something better than a worldly dream, he offers hope.