I think most of us kooks are quite aware that the SW belonged to Mexico. For a few years, anyway.
On the other hand, you're the Doofus if you think there was anything more here than a few spanish ranchers and native indians - and zero mexican indians. Mexico did exactly squat with the entire area, hence deserved to lose it to a better, stronger society.
I hope you don't have a problem with that.
You are a product of public education, read a history book.