Third world demographic, third world behavior. our cities are third world regions with receding pockets of first world holdouts.
This is exactly what I mean when I say some migrants may decide that the USA is not exactly the land of milk and honey they imagine it to be from movies. I didn't visit Latin America, but I have been to The Philippines. While Manila is clearly awful in certain neighborhoods, the smaller cities are surprisingly calm and orderly (except for the constant noise of motorized rickshaws) and not as scary as certain US cities. I also didn't see masses of homeless bums outside Manila and people didn't try to rob or scam me. Maybe most Latin American nations (except for the most violent ones like Venezuela, Honduras, Guatemala, El Salvador, and Brazil) are similar in this way.
The fact this happened on a busy street in daylight really shows how bad things are. Imagine how much worse things will be with an extra 100-200 million of the poorest migrants from Africa, the Middle East, and Latin America driving down wages, increasing unemployment, increasing housing costs, and driving up crime rates. Things are bad, but could easily get a lot worse and make a few consider going back home.