Why would the US government notify the Mexican government on the locations of a group that is acting within US borders? What is next, notifying Germany on the actions and locations of Martha Stewart?
Top it off, have the Minutemen been seen doing anything illegal or anything that violated the illegal immigrant's rights? If not, I don't see this as anything but harassment.
If you read it, they notify the Mexican government regardless if the law is broken. I'd have no problem if they acting beyond the means of a private citizen, but I haven't read of any accounts.
Besides, if the Mexican govenment is notified when the Minutemen 'participate', it will also help give the locations of Border Patrol as well.
In a word.. collusion.