Oh, look at your source.
The Catholic Encyclopedia is a superb source for European history.
Any modern source that still refers to Islam as "Mohammedanism" is certainly not one to look at for a comprehensive and reasonably unbiased look at Islam.
Except for the part about owning slaves -- which many of our Founders did, with less justification, I might add -- your laundry list can apply to any number of secular and religious leaders in Europe over a period of centuries, up to and including the 20th.
He was not like Jesus, the peripatetic teacher and philosopher, that's true. King David, on the other hand...