In my opinion, passing such a law would smack of the same manner of thinking that got us hate crime legislation. Anything that is a "hate crime" is also "just" a crime and was already covered by existing law.
Besides, I don't want my right to burn a Qur'an subjected to any law that I'm the sure the Islamists would try to get through the minute a law against burning the flag was passed. I can't burn my neighbor's Qur'an, but I sure as heck have the right to burn mine.
Exactly.
I don't care if 100% of people in a state wanted to outlaw free speech or gun ownership, it would still be a terrible idea.