The link above will take you to a story from today's NPR broadcast of Morning Edition. It discusses the rise of hate groups (like the KKK) concomidant with the anti-immigrant movement. Disappointingly, Sepremist groups have taken a strong interest in the anti-immigrant movement. This is less than appealing--imagine Klansmen lighting crosses on the lawns of Latinos in Kentucky and you'll get the idea.
The article also points out, as I have here, that the U.S. is in the midst of a full-blown nativist backlash.