They cannot read the signs because they never took signs to begin with. This is the Law: Just like before a Tsunami, the merciful waters are drained first, then comes the Flood of His Wrath. First comes the coldness of heart, like a winter storm that causes everything to freeze and be stilled, then comes the Fire and Fury as the movement of His Wrath. They never counted on the recompense of Holiness and that was their downfall.