It’s not even clear that drawing the Prophet is against their religion and if it is, it seems if I draw a picture of a dog or cat or President of the US is just as prohibited.
http://www.dailysabah.com/world/2015/01/14/why-muslims-reject-the-depiction-of-prophet-muhammad
How can it be wrong to draw their prophet when there are no photographs of him...nobody knows what he looks like.