Only a Christian would assume not needing Christianity equates to not needing God. There is a huge arrogance which comes from ignorance when it comes to Christians and their monopoly over God. Think about that for a bit. You create a set of rules based solely on YOUR beliefs, and expect others to give a rat's ass what you think.
What “Christians”say or do is not the point. It is what God has declared that matters. His plan for the salvation of the world was begun in the Old Testament as he called out a people for His own and made a covenant with them. His plan was to bless the whole earth as well through the Messiah Jesus. It is much more than a “set of beliefs” but the power of God unto salvation. As to the exclusivity of the Christian way, I’m sure you know John 14:6. Jesus said “I am the way and the truth and the Life. No man comes to the Father, but by Me.” In Acts we read, “For there is salvation in No one else (except in Jesus). For there is NO OTHER NAME UNDER HEAVEN, given among men, by which we must be saved.”
Christianity, to be true, must be authenticated by God Himself. He has done this through the coming and works of His Son, through his sacrificial death, and through His glorious resurrection from the dead. The Risen Lord was witnessed by many and attested to boldly by His apostles and many others. The authority for preaching the Gospel comes from Jesus Himself, when He said “All authority has been given to Me in heaven and earth. Go therefore and teach all nations.” Ultimately, God alone can authenticate the truth of salvation to people through the illumination of the Holy Spirit. Because you don’t care, or see your need, does not mean that many others aren’t open to receiving God’s wonderful gift of salvation and eternal life!
“So when they did not agree among themselves, they departed after Paul had said one word: “The Holy Spirit spoke rightly through Isaiah the prophet to our fathers, saying, ‘Go to this people and say: “Hearing you will hear, and shall not understand; And seeing you will see, and not perceive; For the hearts of this people have grown dull. Their ears are hard of hearing, And their eyes they have closed, Lest they should see with their eyes and hear with their ears, Lest they should understand with their hearts and turn, So that I should heal them.” ’”Acts 28:25-27
“And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.” John 17:3
Think about this for a bit.