Mexico and Germany talked of an alliance if the U.S entered ww1. There was talk of invading mexican oilfields but the U.S shelved the idea when Mexico threatened to blow them up. uncle Sam doesn’t tolerate threats in its’ backyard. That’s pretty obvious al la Cuba. Whilst an alliance between Mexico and Russia is probably fanciful, an alliance between Mexico and China is another matter.
Ah, yes the famed "Zimmermann telegram." Has given rise to so much fantasy "alt-history" fiction.
Was a mere blip / is not worthy of serious discussion.
Any comparison of the current situation in Ukraine with some outrageous sci-fi scenario involving Canada or Mexico is simply a weak attempt at deflection and distraction. Someone is trying to "derail" the discussion!
Regards,