For decades, Saudi Arabia has positioned itself as the leading champion of Sunni Islam. One way they've done that is by bankrolling Palestinian causes, including funding the Palestinian Authority to the tune of $20 million a month. Yet Saudi efforts in the West Bank pose a problem for President Erdogan. He's made it no secret that he wants to restore Turkey to what he views as its rightful place atop Sunni Islam. Yet so long as the Saudis are viewed as the defenders of the Palestinians, that's not a mantle he can steal. That's why Erdogan is cultivating support within East Jerusalem—and why the Palestinian Authority is pushing back.