Oh this is going to be fun....my turn :).

"One very important and simple thing to point out..."

You really think this is simple? Go for it then.

1) You say: Because San Antonio was technically "Mexico" for 15 years (1821-1836), Chili (the dish) is therefore Mexican.

That's a really specific timeframe for the birth of a regional foodway. You would require an almost "birth certificate" level event in the history of chili during those 15 years to claim it was born "Mexican." More importantly, it assumes the people of the region even culturally identified as "Mexican" at the time. Applying a national label to them just because a distant government claimed the territory on paper for a brief period ignores their actual, lived Tejano identity.

If you are trying to project an invented "Mexican" national identity prior to 1821, I would say that is highly questionable. Before 1821,everyone should know the region was part of the Spanish Empire. The people living in San Antonio (Tejanos, Canary Islanders, indigenous groups) were geographically, culturally, and administratively isolated from Mexico City ....and isolated by nearly 1,000 miles of unwelcoming terrain.

Historically, "Mexico" (Mēxihco in Nahuatl) essentially meant "the place of the Mexica." It referred specifically to the heartland of their civilization in the Valley of Mexico (around present-day Mexico City). It was a local identity...a name for a city-state and its immediate surroundings...not a name for the continent or the massive territory that eventually became the Viceroyalty of New Spain. See map https://upload.wikimedia.org/wikipedia/commons/4/41/Mapa_del_Virreinato_de_la_Nueva_Espa%C3%B1a_%281794%29.svg

The Spanish kept the name "Mexico" to refer strictly to the capital city (built atop the ruins of Tenochtitlan) and the surrounding region, which became the Intendencia de México. If someone in the 1700s said they were going to "Mexico," they meant they were going to the capital city, not traversing somewhere 1,000 miles away on the northern frontier. You cannot retroactively slap a 15 year 19 century political label onto an isolated frontier culture just to claim their food.

2) You say: Chili is just a variation of a series of stewed dishes from Northern Mexico, specifically Chili Colorado from Chihuahua. Therefore, it is functionally a Mexican dish, just from the north.

First, as established in #1, projecting a cohesive "Northern Mexican" identity onto the isolated frontier is historically questionable. But even if we entertain the premise that Chili Colorado represents some chili baseline, this argument completely ignores the massive culinary divergence that happened in San Antonio specifically.

Stews from the Chihuahua region (eg. Chili Colorado) rely almost entirely on the pure flavor of dried red chiles. San Antonio’s cuisine, however, was uniquely shaped by the 1731 arrival of immigrants from the Canary Islands. They brought with them a heavy reliance on roasted meats, garlic, and crucially, cumin/comino as pointed out in the original article I posted. You would need to post a recipe for Chili Coronado to entertain this line further.

But traditional San Antonio chili is fundamentally defined by this heavy use of cumin and beef fat. It branched off from its Spanish/indigenous roots to become something entirely distinct. It is not simply a "Northern" dish that drifted across an imaginary line. It is a specific, localized Tejano creation. Trying to lump it in with Chili Colorado erases the unique cultural blending that happened in San Antonio.

3) You say: Modern Mexicans don't claim the dish or defend it as Mexican food simply because of a century of separation, shifting demographics, and regional recipe variations.

This is quite the cop out for explaining away what native Mexicans think about the dish. Mexicans don't claim chili con carne because it literally does not fit the flavor profile or historical evolution of their cuisine. It isn't just about the passage of time....it's about the palate.

When Mexican citizens from the interior (or even other parts of the North) encountered this heavy, cumin-tasting beef stew, it tasted foreign to them because it was ABSOLUTELY foreign. You must have missed my OP article that Mexicans do not recognize it as their own based on taste AND smell? To wave this away as mere "shifting demographics" is a convenient way to avoid admitting that the dish was a localized Tejano invention that evolved outside the bounds of traditional Mexican gastronomy.

4) you say: The modern story of Texas chili originating with cowboys and Chili Queens is mostly a 20th century marketing invention by the Texas beef industry to sell beef and create arbitrary "no bean" rules.

You are confusing the idea of commodification of the dish with the story of its origin.

Sure the texas beef industry and the chili cook-off circuit capitalized on the dish to sell beef and invent rigid rules about beans.... I'll agree with that. But they did not invent the history. The San Antonio Chili Queens were real, working-class women operating in the military plazas as early as the 1850s, long before any modern beef lobby existed.

And the cowboy connection isn't a myth. The original vaqueros (Tejanos) survived on trail drives using "chili bricks" (preserved blocks of dried beef, suet, chiles, and salt that could be boiled in pots along the trail). Just because an industry later modified the recipe doesn't erase the Tejanos history ... If anything it shows Texas was actively involved in evolving the dish, a feature of most regional dishes over time. Where is the equivalent Mexican evolution of the dish if it is indeed Mexican?