Opinion and stuff
This guy really went all the way and painted an image of himself on the sign! The only problem is, he went through all this trouble to attend a protest he doesn’t even seem to know the cause for, let alone support it!
But his sign is surprisingly accurate – we tend to bash other people opinions without giving them a valid counter argument, but simply belittling their opinion and beliefs. Perhaps what this guy is trying to say, in his special way, is that we ought to be more attentive to other people’s opinions.