We need to be talking about the political implications of what we've built, and figuring out how to fix our mess. This is like the period before the hurricane: everyone should be busy boarding up windows, and you can't do that if you decide you're just not going to talk about the coming storm because it makes you feel bad.
The way I see it, the mods are asking us all to hold our political tongues and see what the comments feel like. They're very clear that it's an experiment. Maybe when politics resume seven days from now, people will remember what quality discourse looks like. This is mods trying to keep the conversation good.