Marian has several excellent posts, as well as an archival newspaper piece, on or relating to Fox's remarks. As always, she writes about international race issues in ways that bring them home and give them personal dimensions.
In one of her posts, Marian talks about the small population of black Mexicans and suggests that everyone read and link to Bobby Vaughan's site on Black Mexico. On that subject I would also like to refer people to this info on a documentary video about the Underground Railroad in Mexico. Curtis Muhammad, who produced the film, is a former member of SNCC and a longtime community organizer and freedom fighter. I haven't seen the video, but it looks very worthwhile. Ask your public or school library to order it.