I've just discovered that there probably is more than one tumblr-blog dedicated to David Mitchell.

But don't bother pondering whether that's a good thing or a bad thing. Just savour the loveliness emanating from those tumblr-blogs. Like this:

 

I should probably point out that David-has-Hitler-hair is a running joke in the comedic circles.

David actually seems more aggressively angry than Hitler in this set of comparative gifs. He was arguing a very minor point in a panel show. Hitler was probably giving a speech.
I'd say 'we now know who the real Fuhrer is', but that doesn't make any sense at all.

*don't know which blog to credit, because I don't get the whole reblog thing. But thank you, blog owner. This is a thing of brilliance.