Yes I did read the Opening text and the subsequent posts with the same "non Muslim" reviews I have seen in many debates over the last 2 years.
You boldly state that he was the greatest human being of all time, this means he was the greatest human being of all time to all people does it not? So what did he do for me? For the Jew the Hindu or the atheist? What great things can we all relate to and agree with your great statement?
In my humble opinion, Mohamed did great things for Islam, those outside of Islam have no factual reasons to agree with you at all.
I can regard Isaac Newton as the greatest scientist of all time even if he was not following what I believe. I am not speaking about belief. Every person has his or her estimation who the greatest is. You are one hundred percent correct there. I am speaking about achievements from many angles.
Let me tell you a story about how the prophet Muhammad addressed the same issue.
One day a Muslim Man an a Jewish man concluded a business contract. The Jew said by, "Moses who is the greatest of all." The Muslim slapped the Jew in the face and said, "by Muhammad who is the greatest of all." The Jew went to complain to the prophet and told the prophet what had happened. The prophet called the Muslim and said, " did you know that when the hour comes everyone will be knocked unconscious including me but I will be the first to awake and then I will see Moses at the throne of God and would not know in what state he was".
Look how humble the Prophet (S+) was.