Anakin's jaw tightens again, though it's not because of Maul this time. He knows Palpatine had untold depths of cruelty; but, every time he learns more, he's glad the man is dead. It's not a very Jedi-like thing to think, he knows.

"If it helps, I know for a fact he's rotting in Hell."

Granted, he didn't remember it really, but he heard the story later. Jedi sacrificed themselves to make sure he couldn't escape again.