These both were about the same character. But this is one of the hardest puzzles I have ever done. The picture on the far left shows "everyone" fighting against "M" with a couple slogans in there as well. immediately on the left, the picture shows a bunch of protestors carrying signs. So, my thought was that protestors carry anti-whatever signs and everyone was against (or anti) the letter M. The most famous Anti-M I know is from the Wizard of Oz: Auntie Em.