"had they been deported, their lives would have been abnormal, too"

I've always wondered about this argument.  Absent some sort of fear of violence, what's wrong with the Dreamers' home countries? For example, Mexico is a pretty amazing place: vibrant, sophisticated, cutting edge, yet still teeming with history. It has a growing educated middle class (all of whom speak English, by the way) that would be a good fit for the Dreamers. From what I understand, the Mexican government is even making a concerted effort to help deportees adjust to their lives. So, again absent fear of violence, what is so wrong about moving?