No it hasn't. It clearly states in the Bible Jesus is the son of God and he died for our sins. And that the LORD created the world in 7 days. What more do you need? It's all here in the Bible. It's not our place to ask or question, but to follow, like sheep do.
Some parts of Christianity have been disprove, such as the idea that the earth is Circle, and that the starts are the edge of the universe. The overall concept of God, and heaven is very vague, and isn't testable so it can't be disprove.
As practiced today, yes. It came from God but has become a tottering behemoth of myth and superstition with just barely enough truth left to barely prop it up. Do you have any idea how few Christians realize that Christ said when He comes back that both He and His followers will have new names? Revelation 3:12 if you want to look it up. If Christ comes back in the same body, why would He have a new name?
http://www.youtube.com/watch?v=ucUayw0cwjY
From the cover of The Baha?is magazine, a publication of the International Baha?i Community:
In just over 150 years, the Baha?i Faith has grown from an obscure movement in the Middle East to the second-most widespread of the independent world religions. Embracing people from more than 2,100 ethnic, racial and tribal groups, it is quite likely the most diverse organized body of people on the planet. Its unity challenges prevailing theories about human nature and the prospects for our common future.
It is almost impossible to prove a negative, the thing is if god were there you could prove with something other than a heavily edited 2000 year old book, but you can't disprove it.
of course for 2000 years no one of their claim is true its all false their bible is corrupt thee have a new bible every week that gets published. They say god is dead and god came back to life they say there is 3 gods. Christianity is a man made religion its not from god Jesus never called himself christian he never claimed to be god or part of god and never said worship but he said hes the messenger of god and said worship Ur lord alone. Use common sense how can god die or crucify himself to feel the pain of others or crucified so if we make sin we will be forgiven. Does it mean you can kill people and u will be saved or god will forgive u Cox Jesus paid for Ur sins this so called religion and belief is laughable.