I visited Saudi arabia once when I alongside few other students went there alongside my professor who was going to give a lecture in one of Saudi Arabian Universities. when we were going back to Iran and we went into the airport to catch our plane, we saw a man being kicked by 3 people whilst on the floor, they were shouting at him in Arabic and I had no Idea what they were saying,. I asked my friend who was Iraqi and he said they were referring to him as a " Brown slave". we intervened and stopped those animals from hitting him, they quickly ran away like cowards. we helped him up and helped to clean himself. I started a coversation with him and it turned out he was from Pakistan and he come to work in Saudi Arabia to send money back to his poor family. I got his details, and when I went back to Iran I alongside my uncle actually help him move to Iran. he's now working for my uncles tire making factory and I see him every now on then.
Of course not all Saudi are animals, but unfortunately it seems this animal behaviour is not rare in saudi arabia when it comes to mistreating Pakistanis,Indians or Bangladeshi.