This is extremely OT, but blonde hair, really? That's got to be extremely rare.
Anyway, I think that it's a bit silly to argue that all arabs are caucasians (or have such features) or that no arab is a caucasian. Then again, what exactly constitutes a caucasian person? Arabs conquered a massive area in the Middle-East and around the Mediterrannean, where people of white skin hues lived and also imported millions of slaves from around the Mediterranean and present day Russia, as they did from Africa. So there is bound to be some people with caucasian features and some who don't of all the people that today, hundreds of years after the conquests and slave trade, consider themselves arabs. Just as there are spaniards with notably darker skin hue than some others, there most definately are arabs with many different kinds of hues of skin colour.
courtesy wikipedia: The term Caucasian race (also Caucasoid, Europid, or Europoid[1]) has been used to denote the general physical type of some or all of the populations of Europe, North Africa, the Horn of Africa, Western Asia (the Middle East), Central Asia and South Asia.[2] Historically, the term has been used to describe the entire population of these regions, without regard necessarily to skin tone.
I'm sorry but I don't see where your rationale is. I wonder if this is a USA vs. Europe thing, where your history and cultural differences cause you to separate Southern Europeans from Arabs in ways that we don't usually in America.
But we better stop because this thread will probably get closed.