The official year of the independence of Mexico from Spain was 1821. California was ceded to the United States in the Treaty of Guadalupe Hildago (ending the Mexican War) on 2 Feb 1848, so there's a few years when California was part of Mexico rather than Spain.
And at that time, there was nothing in California, nor were any of these so called Mexicans. California was built to what it is today by Americans. We turned an empty, dry, dusty wasteland of nothing into something.
California and everything in it does NOT, and never has belonged to Mexicans who have never lived on these lands.
Then again, if these Mexicans want California, maybe it would be ok as long as they take all the leftist moonbats, it's 100's of billions of dollars of debt, and it's share of the trillions of $$ of national debt.
Thank you for the info!