So what if mexico did this with San Diego or even L.A.?
No different really.
Big difference: we can kick Mexico's butt (well, normally...if Obozo wasn't the CIC).
More like what if the US took California from Mexico - or even better, what if we sent citizens into Texas, they proclaimed their independence, and then asked to be merged into the US.
The strong do what they can, the weak do what they must.
There's nothing new under the sun,