A mostly German, slightly Italian buddy of mine that was a Ranger grew a beard when he was in Iraq and said he was pretty commonly mistaken for being Iraqi. So, yeah. A quick glance at the Google Images for "Palestinian" would make it super obvious that Palestinians are not a particularly brown people.
For whatever reason though, commentary on foreign relations from the dimmest parts of the left always includes insinuation or outright claims that their dastardly opponents are driven by hatred of "brown people".