I'll level with you. This is from one of the Indiana Jones movies. The main character, Indiana Jones (left) is a college professor/archeologist. The Nazi (right), as in life, are the bad guys and is getting punched by the good guy. The joke is that the Nazi is being referred to as a trump supporter, which isn't entirely inaccurate, however it is a stereotype nonetheless. Not all trump supporters are Nazis and not all Nazis support trump, however if it were a ven diagram, it would look like one circle since the outliers are very few and far between. Hope this helps