Did that really just happen

Ok, I will try to be as vague as possible so these people cannot be identified, but I have to tell you this story:

I was walking in the building where I work and I saw two other co-workers walking down the hall. The walls were being repainted so everything was in the middle of the hallway. One of the co-workers, we will call him Jack, saw a Bible laying on a credenza. He asked the other co-worker, we will call him Greg, "What, is this the kind of place where we just leave Bible's out all over the place?" At first I thought he was kidding but then Jack said, "Throw that shit away!" I could not believe what happened next. Greg said, "I don't throw away Bibles." Jack then grabbed the Bible and actually said, " Give it here, I'll do it. I don't read fiction anyway." And then he threw it in the trash with a loud thump. I tought that I heard Greg pull it out of the trash so I left without confronting Jack, because he is a supervisor.

Something started nagging me after a few minutes, so I went and looked in the trash can and sure enough, there was the Bible, still in the trash. I picked up the Bible and returned it to it's owner. I then confronted Greg about his cowardice. There was a boss-man there who spoke with Jack about his actions and how they were inappropriate and offensive.

With all that being said, that Bible is someone's property. You can't just throw away someone's stuff because you don't like it. If I saw a book that I had never read, by an Author I didn't know, I don't think that I could force myself to get that angry. What are your thoughts?