So I realize this is a jokey post, but something you may not know is that the middle finger being a rude gesture originated during the middle ages. If you were warring and your army caught any of the opposing army's archers, you would cut off their middle fingers, because that's the thing that archers used to draw their bow string back with. So by removing their middle finger, you were effectively removing their ability to use a bow with their preferred hand. So sticking up your middle finger at the enemy became either a taunt or a threat, depending on the context - "we're coming for your middle fingers", or "we won so ha-ha we still have our middle fingers", aka "fuck you we hate you".

All of which is to explain how the second photo would technically be more correct, since the rest of the fingers are in the right position for drawing a bow string.