As you probably know, JK Rowling is most well known for writing the famous Harry Potter series. When you write books that have been read by as many people as her books, you probably develop a pretty thick skin. That makes Rowling the perfect person to take on the alt-right trolls of the internet.
These pro-Trump trolls enjoy saying nasty things to be people and “shocking” internet users with blatantly racist, xenophobic, or anti-semitic statements. Against Rowling, however, they are just revealed as the lonely, uncreative, dumbasses they really are.
See for yourself: