The certainty of God’s judgment actually is good news if we view it in the right perspective. 

The alternative – the prospect of God forever tolerating wickedness and never bringing recompense for injustice – is far more dreadful. The intended lesson from this brief study, however, is that the gospel is good because it is true. It is a note of clarity in the midst of a chorus of lies; it is a ray of light shining in the dark landscape of this present evil age. The gospel is good because it shatters the walls of falsehood imprisoning the lost through the liberty of reality – whether that reality first manifests itself to us in the extravagance of mercy or the severity of judgment. In other words, the gospel is good because it is from God and it is about God (cf. Gal. 1:11-12). God alone ultimately defines the goodness of the news we herald – not the subjective response of the hearer, not whether it feels palatable to the audience. -Stephen Venable (full article here)