There's no excuse for not knowing God exists and even more so when you know He exists and yet choose not to worship Him.

God's Wrath Against Mankind

²¹For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened. ²²Although they claimed to be wise, they became fools ²³and exchanged the glory of the immortal God for images made to look like mortal man and birds and animals and reptiles.

²⁴Therefore God gave them over in the sinful desires of their hearts to sexual impurity for the degrading of their bodies with one another. ²⁵They exchanged the truth of God for a lie, and worshiped and served created things rather than the Creator—who is forever praised. Amen.

²⁶Because of this, God gave them over to shameful lusts. Even their women exchanged natural relations for unnatural ones. ²⁷In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed indecent acts with other men, and received in themselves the due penalty for their perversion.

²⁸Furthermore, since they did not think it worthwhile to retain the knowledge of God, he gave them over to a depraved mind, to do what ought not to be done. ²⁹They have become filled with every kind of wickedness, evil, greed and depravity. They are full of envy, murder, strife, deceit and malice. They are gossips, ³⁰slanderers, God-haters, insolent, arrogant and boastful; they invent ways of doing evil; they disobey their parents; ³¹they are senseless, faithless, heartless, ruthless. ³²Although they know God's righteous decree that those who do such things deserve death, they not only continue to do these very things but also approve of those who practice them.