I would consider those political questions to be directly related to the current workspace, and so allowed to talk about. Most of the time what people refer to is activism (our company should support X, because I think X is the correct political action) when talking about neutral environments, at least from what anecdotal observations of the many times this argument has come up on HN. As well, I wouldn't consider long arguments during work about opinions on {current political topic} to be relevant or even useful. (If you really desire such, then outside work time is prevalent, though you have to be careful of pressuring coworkers into such activities if they don't want to discuss politics at all with work).