Why do you care if they burn a copy, 10 copies or even a billion copies of the Quraan? Islam haters have been burning Muslims for decades before they burn the Quraan, they burned Muslim children, Muslim women, Muslim men, Muslims' homes, mosques, lands, and countries. Which is more sacred? The Quraan belongs in hearts rather than on papers anyway so let them burn all they want, as long as they're not affecting our hearts or minds they're not affecting Islam. People are making a fuss over the wrong thing, we seem to have lost sight of the things that really matter.
