Why is it important to study the concept of The Original Sin in Christianity?

Professor Jurgen Moltmann in his book, The Crucified God...

Professor Jurgen Moltmann in his book, The Crucified God, said: The death of Jesus on the cross is the center of all Christian theology…all Christian statement about God, about sin and death have their focal point on the crucified Christ. All Christian statement about history, about hope stem from the crucified Christ.

It is evident that without the concept of The Original Sin, there would be no need in Christianity for the crucifixion of Christ (pbuh), and the attendant doctrine of salvation or atonement to take place through him alone.

Garner Ted Armstrong, the Executive Vice-President and Co-Publisher of The Plain Truth - a Christian Magazine from America, which boasts a current, free world-wide circulation of six million copies a month - attempts to answer his own puzzle under the heading: "WAS THE RESURRECTION A HOAX?" It is stated that the resurrection of Jesus Christ of Nazareth (pbuh) is either the supreme fact of history or a flagrant, deliberate fabrication boldly foisted on the followers of Christianity.

In the strongest terms, Josh McDowell, an American Evangelist, claimed in his book, The Resurrection Factor: I was forced to the conclusion the resurrection of Jesus Christ is either one of the most wicked, heartless, vicious, hoaxes ever foisted upon the minds of men, or it is the most fantastic fact of history.

The open controversy among prominent Christians themselves on the contentious issue of the crucifixion of Jesus (pbuh), which was deemed necessary for the atonement of the alleged Original Sin, underscores the importance of pursuing serious investigation of such a concept further.