Normally a person would not mention Donald Trump, Milo Yiannopoulos, and PewDiePie in the same context. PewDiePie is non-political and fairly inoffensive for all that he is the single most popular content creator on YouTube. For all that, he has something in common with the other two, in that he is at the center of a war between the old media and the new media.
YouTube user Sargon of Akkad has demonstrated the campaigns against both Milo Yiannopoulos and PewDiePie with the following video.
Moreover Sargon of Akkad launched a petition drive in support of PewDiePie on Twitter, which in spite of overwhelming support was removed from the trends by Twitter.
PewDiePie is basically an innocent victim caught in the cross-fire between the mainstream media and the new alternative media. He was chosen because of his high profile, to demonstrate to the alternative media that the mainstream media still has the power to control the narrative.
That the narrative is slipping is shown by Donald Trump and his infamous use of Twitter. Through his use of that platform he is able to communicate directly to the people, bypassing the media’s role as the gatekeepers between events and the public. He will make tweets that he must know are outrageous, simply to provoke a reaction from the media. That he restricted certain media outlets from his press conferences is called a threat to the First Amendment freedom of the press, in spite of him not taking any actions that would shut down those media outlets. He is denying their role in shaping the narrative, which is why so many in the media are saying he should shut down his Twitter account.
Both Donald Trump and PewDiePie are fighting a war against the power of the mainstream media. PewDiePie is doing it out of necessity due to him being a victim of a smear job the same way as Milo Yiannopoulus. Anyone who supports the free flow of information and opposes media smear campaigns should support PewDiePie.
As a side note, it has been noted that Daily Stormer has declared itself the number one fan site of the Wall Street Journal.