Yesterday, Twitter verified white supremacist Jason Kessler, known most recently as one of the organizers of the Unite The Right rallies of Nazis, the KKK, and white supremacists in Charlottesville earlier this year.
Twitter has a Nazi problem. It's always existed and it's never been worse. They claim to take the problem seriously, to always being working hard to make the service safe. But their actions never actually match their words. More than the words of the CEO themselves, or any of the other executives, Twitter as a company speaks with a voice. And that voice says "we want Nazis on our site."
Other companies don't have this problem as much as Twitter. Last week, Uber and Lyft banned Laura Loomer after they tweeted about Muslim drivers. I know, even Uber! That person is still on Twitter. In August, OkCupid banned Nazi Chris Cantwell after their behavior surrounding the United The Right rally. When these companies take this action, their corporate voice is proclaiming, "We don't want you here."
Twitter bans people for hate sometimes. But it's almost always because of an incredible amount of high profile public backlash. Last year they banned Milo Yiannopoulos and last month they banned Roger Stone. These cases were never about Twitter appropriately responding to a bad actor behaving harmfully towards others and booting them from the site. Twitter only responded to these cases because the backlash of public opinion they faced would've been more damaging than the abuse itself.
Twitter is a company of thousands of employees. Some of those employees are Nazis. CEO Jack Dorsey probably isn't a Nazi. As an individual person, Jack probably doesn't want Nazis on his site. But what he doesn't want even more is to do anything about it.
There seems to be enough lower level employees in the company who are explicitly supporting Nazis and the general culture of abuse and harassment, that what emerges is a corporate voice of welcome towards those users and that behavior. Combine this with Dorsey's and the companies lack of executive action, and you have a site that tells that Nazis they are wanted.