The onus is on the accuser to provide evidence of their claims. Management agreed that a list of funny names does not count.
Yet the employee continued to make unfalsifiable assertions such as:
"the silence in the background is what racism and white supremacy does...It doesn’t require active malice".
So denying an accusation of white supremacy is evidence of guilt, and remaining silent in the face of such an accusation is also evidence of guilt.
It's impossible to work with such people.
But why? What process led those people to decide it doesn't count? And why would only the management have a voice in that decision?
Claims of white supremacy need to be backed up with proof.
Histrionic breakdowns and screaming at screens doesn't count as proof I'm afraid.
Rather it sounds like a person afraid to share his views for fear they would be misconstrued or met with emotional outbursts.
Employees were claiming Basecamp has a white supremacist culture, an indictment against anybody working there. The idea that you can't reject such preposterous accusations without being "complicit", or without the denial somehow serving as further evidence, is insane.