I do not approve of burning holy books, but I think it should be legal.
What people shouldn’t do and what should be banned are different things. I don’t want to live in a place where what is not mandatory is banned. There has to be some room for freedom of expression, even for people expressing ideas we dislike.
Okay, people will rip the holy book of the week instead. You may not have a good reason to do it, but others should be free to do so.