I have little knowledge of South Park, yes. Incidentally, I saw about 2 min total of it once, channel surfing, and found it funny. But I don't imagine any media executive enjoys making a show, then receiving angry letters, then pulling it, shaking up the staff, and apologizing. If South Park executives are somehow an exception, well the exercise can be repeated. With repetition, even dogs learn.
South Park has offended people for 9, count 'em, NINE years.
This won't change anything and you can bet Matt and Trey are making notes.