Nebraska Huskers t-shirts featuring new cartoon mascot Herbie Husker, left, and old cartoon mascot, right, are displayed at the Husker Hounds store in Omaha, Neb., Saturday, Jan. 29, 2022.

The cartoonist who created Pepe the Frog has killed off the character in a rebuke to far-right extremists who transformed a benevolent internet meme into a racist, anti-Semitic symbol.