Rhetorical question: So because San Diego is a large city it can absorb these disease-ridden illegal aliens without negative consequences?
It is the Cloward-Piven strategy used in a focused way. The globalist created the 'North American Union' concept as a major step to total world government under their control. The democrip regime worked with other orgs in other countries, to arrange the sudden wave of illegal children flooding into the Souther Border. The act of doing that is treason writ large yet the republicants will not impeach and remove such traitors because the republicants serve the same masters, not the people.
The current regime cares not one whit about the children because they designed an invasion of these disease riddled children as tools to destabilize the Southern Border states which do not tow the oligarch's commands. The democrip party has used children as tools on many occasions. This is just the latest evil act from their service to the oligarchy. And please, do not forget under whom the 'North American UNion' dream spewed forth!