I've been to Tijuana. They love Americans there... but really because of the money that trades hands. These invading hordes have their hands out wanting stuff without paying for it, something the shopkeepers of Tijuana are pissed out.
The caravan was treated well as long as they continued on their way. You ain’t seen nothing until these ‘migrants’ are stuck in Tijuana waiting for their hearings. Could be up to 6 weeks. With no money.