This is an exception.
Yes, it is the Muslims who kill muslims who want to leave Islam. Islam does not benefit the people of this world, it only tries to turn people into puppets with no sense at all.
The world is bombarded daily, hourly with threats and slaughter in the name of Islam -- the Iranian president is telling the world he's out to establish an Islamic empire, with nuclear weapons to back it up -- and a good portion of the West stands in a corner, fingers plugged firmly into their ears, shouting "not so, not so, not so!"