I feel that, & my prayers go out to all those Families that are displaced. It is certainly a complex issue in all nations and with all peoples... but the theology of family in America is much more of a "kick the bird out of the nest" mentality, where as the Mexican people generally value the presence of family binding together in the home at a much higher level.
It also seems much more standard practice to have the extended family living in the same home throughout all their lives not just in Mexico, but also with Mexican families living in America. In my experience, I would say this is also true for most families from India that now live in America as well.
Yes, of course. All over Latin America, as well as India, Africa, the Middle East, and even in places like Italy or Portugal the family is where you can always go if all else fails. Though the "kick the birds out' mentality is even more prevalent in Germany or Scandinavia, where teens like to rent an apartment with their friends rather than continue living with their parents. I'm not saying either way is good or bad.
What IS bad, though, is when people end up on the street because there is no one to fall back on. Maybe there is no family, or they don't want them. And there is certainly no social mechanism they can rely on if they're facing problems that are too big to tackle on their own.