Book burnings are bad when they are used to prevent the free sharing of information or ideas. It is a form of censorship. Burning the Quran is not censorship, because this is not an attempt to ban the Quran or prevent anyone from reading it. Its an entirely symbolic gesture. Its comparable to burning the American flag, which I’m guessing you’re not so against.
It annoys me that people keep saying “figuratively” is what they mean instead of “literally”. “Figuratively” may be the opposite, and technically correct, but the use of the word “literally” in this way is to strengthen a statement. A more appropriate correction would be “actually” or “seriously”, which holds the intended meaning. “Figuratively” is the last thing it should be replaced with.