It IS satire. What you are missing as that you are looking at every image separately. The whole thing as a unit is satire. it is satirical in the fact that it puts together some overly offensive images in such a fantastical way. The fist bump is key to all of this with the E.D. Hill "terrorist fist jab" thing to be kept in context. Think about it. The New Yorker seems to be indicating that they are actually a bunch of fist-bumping flag burning terrorists. It's funny because it's so absurd!