Sweden raised its terrorism alert level on Thursday one notch to the second-highest, following a recent string of public desecrations of the Qur'an in the Scandinavian country by a handful of anti-Islam activists, sparking angry demonstrations across Muslim countries.
There’s also a difference between burning one book and burning all examples of said book.
It’s also a question of not applying your religion to others. Your religion does not allow you to burn your own book, but you can’t impose that restriction on others, as long as it’s a book that they own and are not burning someone else’s book in the legal sense of ownership.