The Good News of Jesus Christ is more than the "Golden Rule." It is more than just loving our neighbor as our self. "For it is the power of God to salvation for everyone who believes..."
Jesus Christ is not a set of religious principals to practice, but is the incarnate God who became a man "that whosoever believes in Him should not perish, but have everlasting life." The Apostle Paul said to the Corinthians:
“Do not be unequally yoked together with unbelievers. For what fellowship has righteousness with lawlessness? And what communion has light with darkness? And what accord has Christ with Belial? Or what part has a believer with an unbeliever? And what agreement has the temple of God with idols? For you are the temple of the living God. As God has said:
“I will dwell in them And walk among them. I will be their God, And they shall be My people.”
Therefore “Come out from among them And be separate, says the Lord. Do not touch what is unclean, And I will receive you.” I will be a Father to you, And you shall be My sons and daughters, Says the LORD Almighty.”
Apostasy (for Christians - the falling away from truth of the Gospel) is part of the evidence that we are in fact living in the very last days. Jesus is coming soon. Do you know Him?
"And I heard another voice from heaven saying, “Come out of her, my people, lest you share in her sins, and lest you receive of her plagues." —Revelation 18:4
"Adulterers and adulteresses! Do you not know that friendship with the world is enmity with God? Whoever therefore wants to be a friend of the world makes himself an enemy of God." —James 4:4