No one knows what Mohammed looked like. There are only vague descriptions, of uncertain provenance. You can't therefore know how to depict him. So if you draw a picture and give it a title 'Mohammed' that will offend some Muslims. If you give the same picture the title 'Fred' you won't upset them. It's not even the picture, but the supposed intent behind the picture which can prove fatal. Is that an idea that anyone should take seriously for one second?
I’ll send a shot of Nanker Phledge’s massive dong, draw a beard on it, and away you go son