From the article:

"That confusion is compounded by the fact that, for a small company, Basecamp has taken an outsized number of political stances — all of which employees are encouraged to discuss. Most prominently, the company and its founders have been vocal critics of Apple’s 30 percent tax on in-app purchases. But it has also involved itself in politics at a much lower level: in 2018 Basecamp let a candidate for Chicago mayor use its office in the West Loop as a campaign headquarters.

Basecamp employees are encouraged to discuss the company’s own political positions — or, perhaps more accurately, the founders’ political positions — as much as they like. Keeping track of which issues of the moment are up for discussion thus becomes one more chunk of mental overhead for employees who are already struggling."

There's no clarification here - since they've banned political discussion and this is a subjective boundary - nothing has been adequately clarified.

And saying they're just banning the "needlessly emotional responses" is again, not clear.