I sort of grew up in Saudi, but we were as middle class as they come. I'm not sure if you're South Asian, but if you are I'm pretty sure you experienced it at some point as well. You don't need to look further than how those South Asian laborers are treat to see abuse in human right. Or those Filipino nurses and maids. As a South Asian, you would definitely get the sense that locals would think less of you just because you're brown. Race hierarchy is basically White > Arabs >> Brown. That literally both abuse of human right and structural racism right there.
>>parthd+(OP)
Local Arabs are definitely above White (and everybody else) in the race hierarchy. Expat Arabs, especially those not from the Gulf, may be lower.
This is clearly visible at eg Riyadh immigration, where there are three unposted but universally observed lines: Gulf Arabs in white thobes, professionals of all sorts, and manual laborers.