I don't think we're generalizing about all arabs. i think it's more about people who use their nationality and in this case national dress as some sort of passport for rudeness.

that's generally how it goes, right? I wouldn't think twice about telling off someone who cut in front of me or was rude, but if they're in abaya or thobe you starting thinking 'oh no, can't say anythign to them, it's their country, could get in trouble, and if I do say somethign I'll just hear about how I should get used to it or leave'.