Turn your head and cough, Cap!

How could he suspect? Well, the enormous groin-grabbing hand might have been a clue. Rather clumsy text: it is not necessary for Cap to learn that the do exist to suspect how deadly they could be. Nothing keeps one from sitting down and contemplating theoretical situations.

Hmm. If tiny folk did exist, could they pose a harm to one's self? Stop asking foolish questions, Captain America, until you have verified their existence. I'm just saying - there's nothing about diminished size that leads one to think they wouldn't have the same emotions and motivations as normal-sized humans. We tend to associate something minature with something cute, and cuteness with innocence, but - Shut up! Stop it! Aren't there actual Nazis you couldn't be hitting in the face right now?