https://en.wikipedia.org/wiki/Lauren_Southern
> Lauren Southern (/ˈsʌðərn/; born 16 June,[3] 1995) is a Canadian far-right political activist, book author, and internet personality associated with the alt-right.[4][5][6] In 2015, Southern ran as a Libertarian Party candidate in the Canadian federal election. She worked for The Rebel Media, a far-right online media company based in Canada, until leaving in March 2017.
She also tried to physically prevent refugee rescuers with a far right "identitarian" group
Now she doesn't sound so innocent and the reason for YT decision seems pretty clear and uncontroversial
Conservatives love to push the idea that they were targeted purely for being conservative. Look at the reaction around Damore, for example. It's all about how conservatives are being oppressed, how you can't trust the media and tech because they hate conservatives.