Actually I do think it makes them less of a prophet. This is one reason I do not believe in any of the claimed prophets. None pass the test of having an ear to a god. I do not just hand out that trust to anyone, do you? BTW, Moses failed in a massive way. He ordered the murder of three thousand of his followers for making a golden calf. This puts in on par with Bin Laden.<quoted text>
Every prophet in the Old Testament had faults and sinned. It did not make them less of a prophet.
Also your prophet did not just make a personal sin, he instructed the whole of the church to follow the concept that he claimed was what god wanted. And your church followed that order for over a hundred years. Now keep sweeping that under the rug.