From what I can tell, this is an arm of La Raza (or an organization affiliated or similar to them)
La Raza :the Race. As used in Southern California (Having moved from there, I have firsthand knowledge of some of this), this group promotes the idea that southern California (at the very least) is still Mexican territory - that they didn't move, the border did, and illegally. As far as I can tell it's a socialistic/communistic organization that wishes to return the southwest to Mexico (probably in part because of the economy there), and is attempting to do so by moving so many people into the area that they supposedly will be able to ride roughshod over those that would then be in the minority.
Please don't misconstrue my words. Many of the Hispanic people that I knew in California wouldn't have anything to do with this group, worked hard, and loved the U.S. (oh, and were here legally) - but this group, through the liberal politicians in L.A. and SF and Sac, are pushing to have all right for all immigrants (even the illegals) including the right to vote.
I'm sorry, but this group is about as UN-american as it gets...
It used to be that I thought the solution to the "Mexico problem" was to simply invite them into the union, but these days, I really doubt that would do much besides overburden our welfare system and therefore our budget.