I believe that Michael McCaul (R-Tx) stated that he had possession of said pamphlets, although he didn't choose to publish them. There's no telling where these originated; maybe some of the groups who charge these people money and drop them off in the middle of nowhere without food or water.
Here's a blog from Thom Hartmann's website, discussing the history of the US with regard to our neighbors:
'Death Squad' John Negroponte, David Rockefeller, And The Americas Society from Phoenix to Operation Condor - See more at: http://www.thomhartmann.com/forum/2014/06/death-squad-john-negroponte-david-rockefeller-and-americas-society-phoenix-operation-c#sthash.rI3DpyvH.dpuf
"This is beyond money in politics, this is about the presence of billionaires, and I would say trillionaires (certainly if you take into account the value of untapped mining deposits and oil fields owned by the corporations whose shares they own), in society at large.
You cannot have billionaires, and have democracy. Or unelected heads of state called monarchs, who are also billionaires (Europe). It is that simple.
Death Squad John Negroponte has served as a roaming ambassador of the Rockefeller family, ever since Vietnam.
He was involved with the Phoenix Program, which after the Vietnam War ended in 1973, morphed into Operation Condor and similar operations in South and later Central America.
Ostensibly 'anti-communist' operations, they are in fact anti-middle class operations, targeting students, trade union leaders, nationalists, democrats - anyone who could form an intellectual opposition to fascist rule..."