Editorials are managed by the admin staff, not moderators. We have no idea what the justififcation for allowing or disallowing comments on some of these pages is (very likely a checkbox that admins sometimes forget to click). Also, certain types of admin content (such as the "meme explained"-type videos) get comment disabled to ensure they show up high on search engine results without user content risking it being flagged.
As for entries, we have a general idea of what gets the users going in the wrong way. Topics that invite sexism or homophobia – especially around certain topics like muh vidya games – are frequent offenders. We get that users like to engage in politics (like the dissenters in this thread, with the suspensions to prove it), but we try to keep them localized to forum megathreads because it's a pain in the ass otherwise. Large topics like the 2020 election and Gamergate were quite literally more comments than the mod team was able to read.
Or, y'know, we're evil tyrants.