I'm sure you can think of a few times in your life when you had to use force to protect your interests.

[ A few... or a few hundred. ]

The connection might lack intuition by the standards of peaceful civilization, but keep in mind that runes were born in an age of heroes and dragons, gods and giants. A mighty figure like Thor was by necessity destructive -- a weapon not unlike his legendary Mjolnir, always moving to smite the foes of gods and humans, loudly and violently. He was a great defender, and also a force of destruction.

[ Though Thor would simply call himself an ally of justice, because he has an unparalleled aptitude for simplicity. ]

Superheroes in comic books are the same, aren't they? Like Superguy, or whatever his name was.