Quite literally just background characters with no impact on the story or anything. I sincerely doubt this was intentional or done for any specific purpose.
I wonder if it's some bugged skin shader. But even that doesn't make much sense since a bunch of the background women changed too. Different coloured dresses and hair colour. A couple of the men got beards or whatever. It's possible that they are randomly generated, but even at that point, the system would pick from select pre-made assets, and the Saudi clothes/features seem independent of the other models.
It just doesn't make any sense.
If they had wiped away the appearance totally, I could see it being some dubious business, but the models are still clearly presenting as Saudi, but with light skin. Why? Why why why why?