I found this PBS documentary just a bit hard to follow, but it is unique in that it focuses on the plight of Jews in North Africa during the Holocaust and tells the story of Arabs who rescued them or hid them. You can rent Among the Righteous on Amazon or watch it free here.
A quick search of “Catholic” in the Righteous Among the Nations database appears to yield thousands of results. I believe it was when he was visiting the Garden of the Righteous Among the Nations in Israel when Robert Satloff recognized that there was not one Arab listed among the righteous. He found this conspicuous and set off to find the stories that he knew must be out there but must have remained hidden, for one reason or another, all this time.