The 'Dabbing Dude' meme is a meme with something for everyone. No matter how old you are or how kind, most people can relate to the feeling of reveling in another person's misfortune or even inconvenience. This shirtless youth, gleefully dabbing himself into oblivion as he watches a girl fight, represents that exact feeling.
While the premise is very basic, the meme is being used to describe some relatively complex ideas, ranging from politics to history. Versatile memes like this one tend to take off pretty quickly, so you can expect more great memes to come at you soon!