Not everyone, but if you think it's a good idea to get on stage and say that white supremacy doesn't exist as a significant part of American culture, I think I have a pretty solid idea who you voted for in 2020. Especially if you have a reputation for reposting Breitbart articles.
As an outsider, what it looks like happened at Basecamp was:
1. Some people did something insensitive. Not great, but not the end of the world.
2. Some people - possibly overlapping the previous group - call out that said activity is insensitive, and ask for it to stop. Possibly not in the politest way possible, but also not starting fights.
3. A right-wing extremist in a position of power gets bent out of shape and uses his position of power to say that racism doesn't real, and that microaggressions are pretty cool, actually.
4. Chaos ensues. CEO doesn't immediately tell right-wing extremist to fuck off, and instead thanks him for his contributions - which, while understandable in the heat of the moment, isn't a good look for him... especially since he has no deniability about already knowing extremist's true colors.
5. Rather than taking sides between slightly over-enthusiastic concerned employees and right-wing extremism, CEO says that all politics are now off limits, which makes it sound like both sides were equally at fault. Right-wing extremist's position is thus legitimized, which is likely all he wanted in the first place.