I admit I am not fully versed in the histories of all the American colonies but it has always struck me as strange that the Spanish Empire in the Americas fractured so spectacularly after Napoleon overthrew the Bourbons.

Going mostly off of the Revolutions Podcast history of Spanish American independence, it sounds like there were so, so many regional rivalries and bad blood built up even before independence. With the removal of their common overlord, it sounds like most of the colonies almost immediately descended into war between different cities, provinces, or vice royalties.

Peru fought with Chile and Ecuador, Argentina fought with Uruguay and Chile. Bolivia fought Chile and Peru. Columbia fought with Ecuador and Peru. Gran Columbia fractured almost immediately and had multiple armed revolts. Paraguay fought everyone all at once. Mexico suffered civil war after civil war for decades and the Central American federation broke apart fairly quickly

This seems to stand in stark contrast to the other colonial empires, even as they achieved independence themselves. Brazil fought with it's neighbors but it's territorical integrity was never compromised and it never fought any very serious civil wars. The US was politically stable up until the Civil war of course, but remained stable after that and eventually prospered. Canada had some relatively minor issues with French Quebec but nothing on the scale of many Spanish American colonies.

So what was the major difference with Spanish America? You would think the common language, culture, and history would push them towards integration and cooperation but that was obviously not the case. Many of them still harbor pretty serious national rivalries.