When THIS kind of crowd, storms into the streets out of work because of the 2008 Crash, with a lot of time and mischief on thier hands, you can BET masses of illegals are not going to go peacefully back across the border, but will dig in their heels on American soil, squat, and are going to resort to even more and more crime, more violent and in your faces IMHO.
We all saw this, or should have seen it, coming when they flooded downtown NYC, SF, LA, Houston, Dallas, desecrating American flags and yelling "si se puedes". When they get neither (amnesty nor jobs), they are going to revolt IMHO. Joe Sixpack better be ready, that is all I can say.
That big difference between 1930s and now AIT that reason why these people would riot if our US ecomomy collapse it going get very ugly