Question:
What about Hindus, etc. who have been taught all their lives that there are many gods?

Answer:
Abraham was an idolater, but he believed God and by faith he saw Jesus as his Saviour (John 8:56-58). Missionaries have found some in heathen lands who believe in the one true God. This matter of “What about the heathen?” is God’s department, and, “Shall not the Judge of all the earth do right?” (Genesis 18:25). Our responsibility is: “Go ye into all the world, and preach the gospel to every creature” (Mark 16:15).