Only if you watch it impartially and open-minded ,you will realize the truth.At least You should hear arguments from both(Muslims and non muslim) side to decide.Know prophets Biography as whole to get proper idea about his life and personality.Those who slander Prophet Muhammad (Peace be upon him) should either repent or fear painful punishment in Hell Fire FOREVER.Whether you like it or not, believe it or not ,it does not change the TRUTH AND FACTS that will happen after DEATH.. Use logic and rational thinking .Why are we in this world?can there be any creation without a Creator or an invention without an Inventor.? If Creator is there ,then what is the Purpose behind The creation of such a beautiful Universe?