It's no exaggeration that there's a yuge Arab diaspora in Latin America numbering in the millions. There's no greater success story amongst immigrant communities than them. With a POD in the 1820s, have an Latin American country(ies) attract enough Arab immigration that combined full or partial Arab descendants make a majority in said country, much like how Argentina is with Italians. Bonus points if you have the majority of this Arab immigration remaining non-Catholic (Muslim or Orthodox).