French courts /love/ to do blocking orders. Of all the Western European nations, they have the most expansive use of DNS blocking, and other technical orders from courts. Sometimes related to the mundane things you might imagine like counter-terrorism, anti-piracy, and obscenity, but sometimes for absolutely bonkers reasons nobody agrees with.

Knowing what I know about French blocking orders, I wouldn't be surprised if all of Reddit got blocked because of an order related to a single comment, instead of some larger reason that might make sense in the meta.