Of course it is (my family is from there). The story says it is the mayor of El Cajon the city that is objecting to the actions of San Diego County. The original headline makes it sound like it's the mayor of El Cajon that is giving a "massive middle finger to America". Even the OP had to insert "San Diego" to correct the inaccurate headline.
Major California city [San Diego County] gives massive middle finger to America in shock plot with Mexican Consulate
It’s not well written.