I wouldn’t worry about Mexicans. Let them take the independent California. If we start now, by the time they get here, we can have the Chinese convinced Mexicans are a delicacy. How to get rid of the Chinese after they buy a couple of ports and stack soldiers ten deep over the entirety of the landscape is what we should be worried about in that scenario.
LOL, they go through all of that trouble to get out of Mexico, only to be back in Mexico again.