https://www.vox.com/culture/2017/2/17/14613234/pewdiepie-nazi-satire-alt-right

He has repeatedly and overtly used Nazi imagery, made a multitude of "jokes" like this:

Mr. Kjellberg says the material is portrayed in jest. He showed a clip from a Hitler speech in a Sept. 24 video criticizing a YouTube policy, posted swastikas drawn by his fans on Oct. 15 and watched a Hitler video in a brown military uniform to conclude a Dec. 8 video. He also played the Nazi Party anthem before bowing to a swastika in a mock resurrection ritual on Jan. 14, and included a very brief Nazi salute with a Hitler voice-over saying “Sieg Heil” and the text “Nazi Confirmed” near the beginning of a Feb. 5 video.

[...]

In addition to more overt Nazi symbolism, Kjellberg makes references to the alt-right that are veiled but obvious if you know where to look. In one video from late August, he makes an extended racist joke comparing Harambe the gorilla to Saturday Night Live and Ghostbusters actress and comedian Leslie Jones, echoing the widespread politically tinged, racist harassment that Jones endured last summer, largely from the alt-right.

And in another video from November, Kjellberg overlays a swastika, along with audio of a speech from Hitler, over unrelated commentary about clickbait YouTube channels. He then goes on to refer to BuzzFeed as “a bunch of cucks” — “cuck” being an alt-right buzzword.