Palestinians have Jewish heritage. Before Mohammad the people in that part of the world were mostly Christians and Jews.
Judaism is a religion not a race.
There really is no genetic basis for calling any of the people of Europe , the Middle East, Iran or India different races. All of these people descended from a group that left Africa about 80,000 years ago.
Europe was populated first by hunter gatherers then by waves of invasions after the invention of agriculture, then iron, then bronze.
All these populations have been mixed during times of empires, migration, and wars.
Arabs are dark, so are many Italians and Greeks. You could easily mistake people in Greece for Iranian and mistake Iranians for people from India.