Day of Vengeance?

In Romans 1:20-23, Paul goes onto explain that we can know God exists because His attributes are clearly seen in His Creation. It is inherent in each person. Because God knows His attributes are clearly visible (and He did that so there would be no excuse), it means that people who reject Him do so deliberately. Because of this, God is righteous and just in eventually giving them over to become fully enveloped by their growing delusion so that they cannot see truth at all.