There is no way a communist will ever understand the importance of Christ. But I think you should understand that "Jesus" is simply the name of the flesh body, while "Christ" is who Jesus *really* was. "Christ" or "Logos" desribes the spirit soul residing within the body of Jesus. One really must understand the difference between spirit and matter otherwise Jesus will be mistaken to be just a "human being", when in fact He is a perfectly pure spiritual being who accepted a material body so that we could learn from him.
The reality is that we ALL are pure spiritual beings because we are not our bodies, but we are our souls. Since we have fallen into this material world we are covered by the impure material energy and so our spiritual purity is unknown to us until we awaken and factually see the difference between spirit and matter.
As for scientists doing positive for mankind, you must be out your tree. Scientists are purely materialistic and therefore are not out to better mankind, they are out to fatten their pockets. One might think that technology and science are "positive", but this is only a subjective view based on them making one's life "easier". The truth is that they are not "positive", unless they are being used to further spiritual understanding. A person who is helping to liberate souls from the material condition is a person who is bettering mankind, not a scientist who is making biological weapons for his personal benefit.