why is drawing/depicting muhammed (Muslim) a horrible thing to do?

Why is drawing/depicting Muhammad (Muslim) a horrible thing to do?

I know even Muslims do not have depictions of Muhammad - this question isn't about the Denmark cartoon.

Is no depiction of Muhammad so that people are not inadvertantly encouraged to start almost worshipping/idolizing him?

If so, you already hold him in the most high esteem, could having depictions of him make your adoration any more significant or could it lead to a twisted form or adoration?

Is having pictures/depictions of God/Allah equally as wrong?

I've had Muslims alreay explain they are not so outraged about Christian depictions of other prophets and God because those people are part of Christian belief, but Muhammad is part of only Islam so it is of a special insult to Muslims for Christians to depict him.

But are Muslims allowed to draw pictures of God or other prophets?

If so, then why would drawing Muhammad be a unique wrong?

For childrens books featuring the events of Muhammad, do you not have pictures in them?

If so, do they just show the back of Muhammad's head all the time, or show him just as a shadowy figure with no detail?

Just curious about this.