Why has almost every Arab country been ethnically cleansed of Jews?

You're not supposed to say this. The world pretends this does not happen. The only place Jews can become refugees is Israel. Europe didn't and doesn't want them, Europe opened it's borders to arab immigration following WWII and arab countries have become increasingly inhospitable to Jews. Most obviously Iraq following the most recent US/ UK invasion. Before Jews could live safely there. But no one's supposed to talk about any of this. Imagine if Jews were given their very own UN agency?!