I guess you're referring to the medieval dhimmi business patting Arabs on the back for being better to Jews than European Christians (that's not as great as you think) not talking about the 30 years of British trusteeship where Arabs and Jews shared Palestine, which was marred by a lot of unprovoked violence of Arabs against Jews , er, I mean, "Zionists".
You’re somewhat wrong.
Well, then forget what Europeans did. Forget the Holocaust. Ask him if he knows what Arabs did to protest Jewish immigration and land sales in Palestine from 1920 to 1940. Go over this list of incidents. Then give him this book: Hillel Cohen, 1929:Year Zero of the Israeli-Palestinian Conflict. Then one more book by the same author, “Army of Shadows: Palestinian Collaboration with Zionism 1917-1947.