Their policy seems to be to close comments on anything that attracts a large number of hostile comments.
But was it really that bad? The Eurocrisisblog (2011-2014? it was somewhen renamed) with its debates was incredibly educational, due to commenters who were Euro-Lawyers, economists... I really learned a lot (and read Steve Keens and Picketty, thanks to commenters' recommendations). You had the Greek vs German spats speckeld in, but even that was rarely so rude as to warrant moderation, and in fact helped understand the various sides.
The most censored thing I remember was probably during the Gaza bombings of 2014, but even then there was informative (even though heated) exchange of ideas and opinions. Learned a lot there, too. If something like that is too heated for them now, ok, but there are lots of other political topics that would attract comments more akin to the Eurocrisis. But even there, comment sections usually don't even open these days.