Blasphemy Laws: A Rationale
Muslims - by the virtue of the Prophet - still have a sense of Sacred. This is why they so emotionally and intellectually react to any desecration of Sacred. It is their civilizational right & duty to defend the rights of God, his prophets & his idyaan. West fails to understand that, perhaps.
In USA, if you curse God or Prophet Jesus, nobody would even care, they won't even look at you and pass by. But if you curse someone's color, race or even nose, you'll get sued for 100k dollars or even worse.* This is because they've lost that sense of Sacred. It is against this aggression towards the rights of God that blasphemy laws exist.
Last para example is taken from an audio clip on Salman Rushdie Affair by Dr Seyyed Hossein Nasr.http://mac.abc.se/home/onesr/af/_audio/A065e_SH.Nasr_Sh.Tantawi_19.mp3