The uncomfortable truth is that it matters whether the group in question contains enough people willing to kill indiscriminately if you upset them too much.

To answer your rhetoric question: Because people believe in it for some reason. If millions of people were crazy enough to think Star Wars happened and molded their lives after it, and you started burning Star Wars DVDs because you despise Star Warite refugees, yes, people would be very upset at you for doing that.

People are clearly burning religious text to demonstrate their contempt to a group of people, it’s the definition of a hate crime.