FWIW outside of a very narrow band of people that are actually trying to draw genuine historical parallels between Hitler and "Individual X" (or invoke naziism/fascism in general for that matter) it pretty much puts me right out of a conversation when such terminology is used.
Far and away the most common usage for the name "Hitler" is a lowest common denominator term for "something/someone I really want to associate with bad things" since even most Jay Walkers know about Hitler.
I agree. But what I don't understand is why someone would call it a racist comment.