Yeah really.
If it was Mohammed, he'd either be burning in Hell if depicted now or, if depicted while alive, he'd be killing innocent people or raping little girls.
A bearded guy could be anyone.
Mohammed Image Archive
Depictions of Mohammed Throughout History (including the ones they're rioting over)
Warning: It could take a while for the page to load all the graphics and I believe this is a leftist website too but that doesn't concern me, I just wanted to see the pictures.