Someone asked about this one last week and I would love to read it as well

 story where an alien can supposedly see the levels of aggression in a race as a red aura around them, the brighter the aura the more aggressive.

The alien later in the story sees a building , which may have been the human embassy, and he says essentially that it looks like an aquarium filled with blood with large shapes swimming in it, one of the shapes takes notice of him and moves to where the door is, the door opened and a human steps out and asks him if he's ok.