For being "brown"?
Not trying to invalidate all you saying, but to classify whomever as a color is erroneous. And take it from someone who went from white to brown in people's eyes the second they found out where my mother was born is offensive as well (offensive in terms of people switching perceptions merely because of a location). Ironic also, since she's as pale as anything and my tanability and facial features comes from my father.
Also, come on, these are economic migrants. People don't walk 2000+ miles because they are in danger. Not saying that dismisses the hypocrisy of these "But mine came here legally by, um, being European" bullshitters, but what do these people think is wrong with going to much closer and less xenophobic Costa Rica and Belize, etc? Belize - British Honduras, is right next to Honduras. They can get there in a day minus the thousands of dollars it takes to get here and far less dangerous as well.