ISIS Joke

Alright, listen up, you chucklehead. The joke is funny because it uses a play on words. It asks what makes an ISIS joke funny, and the answer is "the execution." See, ISIS is known for executing people, but "execution" also means how well something is done. So, the joke implies that an ISIS joke is funny if it's well-executed, but it also references the violent acts of ISIS. Get it now, or do I need to draw you a picture?