What May be Known About God is Plain
God is just in His anger because He has made Himself known. The evidence is plain and people are not blind to it: the invisible can be seen! There are irreducible mechanisms in nature. If one part evolved without other parts, the system wouldn't work. Although the world is spoiled by sin, there is beauty. We don't see everything there is to know about Him - creation does not reveal the trinity or salvation to us - but we see enough to make our unrighteousness inexcusable.