Reddit mentions of Eternity in Their Hearts

First it is untrue that people cannot or do not know of the Biblical God. Throughout the ages, a Supreme God has been acknowledged, not just by the Jews and their spiritual descendants, but by people of every tribe and race. Pachacuti, king of the Inca Empire, came to reject worship of the sun, Inti, and sought out the one true God, The Santals of India, Gedeo of Ethiopia, the Mbaka of the Central African Republic; The Chinese had Shang Ti, Lord of Heaven, and the Koreans had Hananim, The Great One: ancient names reverenced long before Buddhism and Confucianism source

There are “more than 300 declarative passages in the Old Testament which amplify God’s oath-sealed promise to bless all nations on Earth (ex: Psalm 67, Isaiah 49:6). There's a great deal of the Old Testament is dedicated to narratives of various sons and daughters of Abraham being a blessing to non-Jewish peoples, that the Holy Spirit revealed so many narratives that show both the top and bottom lines of the Abrahamic Covenant at work in the lives of Abraham’s sons and daughters. No one is out of reach of God.

They will be judged according to their deeds, how can that be anything other than fair?