I've been pulled over and defected in my stockish 95 gtst. totally stock body. I was parking in the rocks, when a police officer came up to the window on a bike and told me to follow him.
I'm totally australian, was on my own and was just going to a moving away party. I was polite to them, got defected for a couple of minor things but all in all they were ok.
I don't think its always the fact that you are middle eastern, rather the fact that you probably get agro as soon as pulled over and feel hard done by (i've got a few leb mates and i know they have absolutely NO love of the police) which gets them offside.
2GU UP, i've seen your r32, its a nice car but surely you know its gonna draw attention, especially at night. Like other people have said too, i guess it depends on who you get as a cop.