Sacrosanct
Legend
Qu'ran, Bible, Player's Handbook, or See Spot Run, makes no difference. Book burning has, and will always have, very powerful personal, cultural, and historical meaning. Nothing happens in a vacuum, and some things are always inappropriate.
Does he have the "right"? Sure. Nobody's talking legal consequences. And we have just as much right--and even, I would argue, a moral obligation, no matter how overdramatic you may personally find it--to speak up about our reactions to the matter.
Oh spare me the self righteousness. These are RPG books, not some work of art or historical or rare thing. It's functionally no different than me throwing out my GAMER magazines. It impacts nothing. Not your gaming books, not access for anyone else, not the company, no one but him and the fact that if he wants the books back, he'll have to buy them again. It's nothing more than him trying to get a rise and guess what? You're giving it to him.
"Moral Obligation"? You have to be kidding me.