Artificial humanitarian Crisis at the Border

We all saw the videos and the photos. American authorities opened up with pepper spray, CA canisters, and possibly rubber bullets. There is at least one video showing a few desperate people throwing rocks before that happened. A local reporter and her Photog captured that. This is not about whether US authorities were justified. There is a slew of international laws that were possibly violated. This is about something else. Why are we here? Why are we in the midst of an artificial crisis at the border?