Lots of Portugese and Spainards (but more so Portugese) have middle eastern admixture (corruption of blood) from the invasions of the Moors over the centuries in Spain and Portugal. That's not true, there are modern DNA studies that prove you completely wrong. If you're talking from your personal experience about the Portuguese you've met, personally I suspect you have been fooled my friend, most likely some Brazilian mestizos were trying to pass themselves as Portuguese in your eyes or some random mestizos  born  in Portugal. REAL Portuguese are White Europeans, take a trip to Portugal before spreading false rumours probably started by envious Brazilians on the Internet.