A) It wasn't a "very small part" of the city of San Francisco. It WAS the city of San Francisco.
B) He was not railing against those who voted correctly, but that there were ANY people who voted incorrectly. Such a vote defies all sense of logic and decency.
C) He (as you are here) was merely expressing his opinion on the matter. I'd hardly describe his column as "bent out of shape." Your comment far closer matches that description.