Book burning has a very dark history, often long and traumatically remembered.

Heinrich Heine famously wrote "Where they burn books, so too will they in the end burn human beings." a century later his writings ware torched at the Opernplatz in Berlin, among many other books.

Curiously, that famous (and prescient) quote was from a play referring to the burning of the Quran.

That it is within the legal rights of people to do so, is a testament to a great legal system we have, that people are actually doing this abhorrent act, is very disturbing.