Rockstar is right, I am saying the same like he does, since years. Muhammad is the guiding example Muslims follow (if they are really Muslims). Hence the term "Muhammedanism". In the end, what Muslims in his time as well as today "believe to know"
about allah, depends on what Muhammad narrated about Allah. That makes Muhammad even more central, neutrally seen, than Allah itself.
And to those who think they must relativise today's barbary carried out by Shariah law and IS terror and the like, by sprinkling ashes over their heads and mourning "Haven't there been the crusades of which our forefathers were guilty?" (a reactive war of defence to recover territory lost to attacking Islam), "Haven't there been religious wars in our countries", and this and that and more of that, I have only one question: when was the last time Christians stoned to death a women for adultry in Europe, when was the last time a witch was burned and the inquisition raged, and nations declared wars over religious issues against each other, here in Europe? Was it in recent present, or was it so and so man centuries ago?
Islam still is a deeply superstitiuous tradition. It got stuck in a medieval mindset that the rest of the world for the most has left behind - since long, long time.
That's why relativising that difference simply does not work. The difference in cultural advancement is not relative at all - it is absolute. It is a fact.