Amen. It takes more faith to be an atheist than it does to simply acknowledge the Truth written even on their black little hearts. It's like arguing against air just because you can't see it. But the whole time they are going red in the face arguing against that which they know to be true, they are doing so by inhaling and exhaling that very air they are pretending to not believe in.
When atheists pretend to not believe in God, they are merely suppressing their knowledge of Him. Without the LORD, they would not even be able to make their fallacious and ignorant arguments.
And Romans 1, as you pointed out, confirms that the knowledge of God is manifest within them.
Atheists know that God exists. It's undeniable. But because their black, twisted hearts are so filled with rebellion against Him, they suppress that knowledge.
But in order to suppress the Truth, you have to
have the Truth!
Undeniable evidence of God is all around us, so their refusal to acknowledge Him, much less glorify Him, is without excuse. This is why they will be resurrected from the dead only to be cast into the lake of fire (Revelation 21:8). They come up with all sorts of excuses as to why they shouldn't have to worship their Creator, and their twisted little hearts only grow darker and darker as they persist in the suppression of the Truth all around them.
Romans 1:21-23
Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
Professing themselves to be wise, they became fools,
And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.
They are, without variation, stupid and ridiculous people, so prideful and full of rebellion that they create an entire religion around the denial of the Truth all around them. It's pathetic.