Dean: I killed Hitler.
Sam: You know no one’s gonna believe you, right?
Dean: You’ll believe me. You were there. 

And that’s really all the counts for Dean. 

Sam : dean pass the salt

Dean : I killed hitler

Sam : dean do you want something to eat ?

Dean : I killed hitler

Random waitress: what you would like to eat ?

Dean : um idk . But I do know that I killed hitler

Random stranger : passes by

Dean : excuse me sir . But did you know I killed hitler ?

Hitler: Give her to the dogs.
Henchmen: We have no dogs.
Hitler: Then get some! I LOVE DOGGIES!
Sam: OMG- ME TOO!
Hitler: DOGS
Sam: DOGGOS
Hitler: PUPPERS
Everyone else: stop

These Nazi guys look really unhappy about resurrecting Hitler while he’s just dancing around like a dumbass.

“Ach. We forgot what a douche das Führer was.”