Lebanon is a quite striking example of what happens when you let Muslims become a majority.
15 Million Lebanese almost all Christians in the Americas. There was a massive emigration of Middle Eastern Christians towards the Americas early 20th century.
A bit more complicated than that. If you really want someone to blame beyond abstract notions of Muslims doing Muslim things, blame both the Ottoman Empire
and the French and the British for Sykes-Picot.
On Sykes-Picot: The British and French conspired to divide up the Levant, the borders they drew were specifically chosen to maintain intergroup conflicts and prevent any unified polities from emerging. Historical Lebanon was majority Maronite Catholic (little known fact: they're Arabised Syriac Christians), but the Lebanon we have today deliberately includes the periphery that was majority Arab Muslim. These borders did not exist in Ottoman times, allowing for greater movement and fluidity between various Christian groups, but Sykes-Picot and the dissolution of the Ottoman Empire following WW1 meant these borders got fossilized and those Christians (mostly ethnic Syriac Christians) in places like Syria, Iraq, and Jordan are more or less isolated form one another. Redrawing borders during decolonisation following WW2 was politically untenable following the birth of Israel, the advent of Ba'athism, and various hardline Islamist factions.
On the Ottoman Empire: Good fucking God, the 19th century was not kind to the Ottomans. You think the Chinese and their century of humiliation was bad? Yeah... that's amateur hour. Reforms came way too late because the excesses of the past came back in such a unique way to haunt them, and the reforms weren't drastic enough or bold enough to make any meaningful dent in the structural problems they faced. Poor stewardship of the environment led to huge swathes of the once-fertile crescent becoming the barren desert that it so often gets characterised as. Power was concentrated squarely within the House of Osman such that no contending lineages, let alone a nobility, could ever emerge. Problem is that they had centuries of state-sanctioned fratricide that dramatically thinned the bloodline because any potential lineages of heirs just got murdered. Fratricide did end in the 18th century, but this just meant competing heirs were under permanent house arrest. Succession crises can happen, someone under house arrest gets put on the throne, and they're fucking unstable because of years if not decades of isolation in house arrest. Not to mention how Balkan Muslims and Christians lived under entirely different rules and guidelines than Arab Muslims and Christians, among countless other examples. That's not even getting into the various genocides and ethnic cleansings that happened toward the absolute end of Ottoman times (the Armenian Genocide wasn't the only one JFYI).
That last part was the biggest reason why so many Levantine Christians fled from the Ottoman Empire to Latin America. Melkite Catholics, Maronite Catholics, Antiochene Orthodox, Syriac Orthodox, the list goes on and on.
