Hitler would have had to take Mexico and force them to fight us. They would have lost anyway but if they had tried to put German soldiers on American soil the bodies would have piled so high they he would have been driven from power.
At what point then is the approach of danger to be expected? I answer, if it ever reach us, it must spring up amongst us. It cannot come from abroad. If destruction be our lot, we must ourselves be its author and finisher. As a nation of freemen, we must live through all time, or die by suicide.
~Abraham Lincoln, Address Before the Young Men's Lyceum of Springfield, Illinois, January 27, 1838
Patton got his start killing Mexicans back in 1916. I can only imagine what a demon he would have been fighting them in WW2.
I've long heard a secret protocol already existed between Mexico and Germany dating back to WWI where Mexicans would grab the southwest as a distraction in the event of a German invasion of North America.
Second, the Third Reich was not a democracy; Hitler was not going to be voted out of office because of some battlefield disaster. The German people were too cowed to express disapproval of Der Fuhrer (consider Stalingrad).
From what I have read years ago, Germany tried to get Mexico into the first world war. They failed.
They tried again in the Second World war. The Mexican people wanted war with the US and when Mexico DID declare war the people were ecstatic! Till they found out Mexico had declared war against GERMANY!
Yea, they were lucky not to meet our Kentuckian turkey hunters on home turf.