How about you prove your point, as you are demanding that he prove a negative. It shouldn't be hard to find racist screeds on American Patrol. Go ahead, do it.
Hint - I spent a couple of nights doing just that. Didn't find anything. But if you want to repeat that exercise, please feel free. But from the nature of your posts so far I doubt you have the integrity to come back with an honest answer.
That people have been politically conditioned over the last thirty or forty years not to say: "I hate Mexicans and want to kill them on sight. Good for those who do" proves nothing. They have learned instead to talk about "the rule of law" which was certainly dead when Roe vs. Wade was handed down and probably forty years earlier. They have learned to yap about the constitution without the ability or willingness to understand that persons, as well as citizens, are protected by the Fifth and Fourteenth Amendments to the federal constitution.
There are people who forget, like Jackelope Breeder who has previously posted his ancestry as partially Blackfoot that the spirit of the Chivington massacre and other bluebelly atrocities against American Indians lives on in the tortured souls of those who live to exclude Mexicans (largely of Indian blood) from this land. They have learned to claim that our "culture" is threatened. They have learned to speak in code.
If you think America depends on either keeping other people not quite like you out of it or at least upon being rude to others not like yourself, you are to be pitied but not supported. America is an idea and an ideal and not some membership club to kick people out of on the sorry grounds of looking or speaking differently.
If Montagnard villagers and Hmong people from Vietnam could come here from stone age civilizations after the war and see their children become valedictorians of their high schools through academic achievement not affirmative action in one generation, we should look to the Mexicans for similar performance.
The conservative movement is rooted in principles and not in bloodlines; in performance and not in soil. The Mexicans are coming whether you like it or not. There is nothing, consistent with the constitution of the United States that you can do about it. The question is whether you are prepared to respond like grownups. Learn some manners. Welcome these folks. Help them. Show them the hospitality which is more of an American tradition than the paranoid border hysteria that dominates so many of these threads.
On the other hand, if you don't like the idea of her Satanic Majesty, the junior Senatething from New York by way of Illinois and Arkansas in the White House as Supreme Commissar, you better adjust your attitudes because those Mexicans may be the one group who can stop her cold. It will take a lot of work but it can be done. She cannot pull the Mexican card on Dubya. His family contains many Mexicans unlike hers or Arkansas Bubba's. In 2008, it's either Jeb or whitebread. If it's whitebread, you better have dropped this insulting nonsense long earlier or we will be teaching our children the soviet goosestep.