Civilized behavior has to start somewhere. Once it's achieved, it also has to be defended, otherwise they'll be selling children into slavery on the open market in France, too.

I come from a world where people kill pets just because they become inconvenient. This doesn't mean I will tolerate someone beating their dog just because I've seen worse. Tolerance of third-world behavior sustains third-world living conditions. I'm sorry you choose to live in such a morally-bankrupt society and that you don't speak out against the atrocities you witness. Let's just say that I'm really glad you weren't the account holder in this recent incident with the AirBnb host. If so, I'd have no chance whatsoever of making the problem known.