Those people were far different from what comes across the border now. Never once was anything ever stolen back in the 50's when I worked on farms and ranches with Mexicans. Now-days, that's no longer true.
Had I read your post more carefully I’d have given a different response, sorry.
You are correct in what you say about folks coming over the border now vs. in days gone by. I have some good friends that own a spread in AZ and they say the same exact thing. They live fairly close to the border and are increasingly frightened, but as they say, even if they were to attempt to sell off, who would buy with border violence the way it is?