[The Hon. Galahad Threepwood]

What people need to realize is that one can be an artist--even a great artist, though having not seen the movie, I haven no idea if this person is one--and still be as dumb as an orangutan about everything else in the whole world except one's art.

[Paul Atreides]

The reason that I say that Voldemort's character is about Hitler is that:

Voldemort is part Muggle (non-magic people)

He despises others who are part-Muggle and wants to rid the world of them

He has followers who feel the same way and do not hesitate to murder; he and his followers also kill Muggles with no hesitation

After his return to power, the Wizard (Prime) Minister of Magic, Cornelius Fudge, denies that he is back in power and a threat

Headmaster Dumbledore, who Fudge fears wants his job, knows that Voldemort is back and must be dealt with.