All the proof you need is how Alan Colmes acted last night while talking w/ Simcox.
I used to have a modicum of respect for Colmes. I think he is a major masshole now.
The "guns have been laid" by the mainstream media as far as the Minutemen are concerned. One incident, no matter how minor, is going to get amplified all out of proportion. I hope the Minutemen are vetting supervising their volunteers very carefully.
The one sure way for them to look bad is to have some open-border sympathizer to penetrate the group and then rough-up an illegal. The other way that I can see to sabotage the Minutemen would be from the Mexican side of the border: send over a bunch of thugs to deliberately attack a small party of Minutemen with the idea of getting them to pull their weapons.