I've long preferred "clique" over "cabal" as the word to describe what was present on Wikipedia when a predictable group of "the usual suspects" gangs up to force their view on various matters to be treated as "consensus" and "common sense" even if it's actually nonsense that's held by a minority. The group that does this isn't all-powerful and well-organized to the extent that it deserves to be called a "cabal", but it's a fairly tight-knit group of friends that's certainly a "clique". (Although, Wiktionary gives "cabal" as one of its synonyms.) It's also assisted by a decent-size army of sycophants that play yes-man to them, for which "claque" is possibly the applicable word.
However, there's also another phenomenon going on, for which I don't know of a good English word. It's that there's a decent-size cluster of people, spread throughout Wikipedia-related circles, including people both within the controlling clique of Wikipedia, and among the ranks of anti-Wikipedia critics such as right here in this site, who are tightly interrelated in a complex network of connections, friendships, enimities, rivalries, feuds, grudges, favors, mutual backscratching, vindictive retribution, and other things, extending in some cases way back in time, and across many different sites, forums, subjects, and places both on and offline. There's a backstory there that puts the convoluted continuity of the DC and Marvel comic book universes to shame, and I only know tiny bits and pieces of it myself, but an awful lot of what goes on both on Wikipedia and on Wikipedia Review owes its existence to this tangled mess. The policy against linking to so-called "attack sites", which (according to somebody posting here recently) had its genesis in the sour grapes of a Wikipedia admin for getting banned briefly from an early version of this site, is one obvious example.
I propose calling this cluster of interrelated individuals a "cluque", to keep it similar to "clique" and "claque".
Any "newbie" stumbling onto a project or community that's under the control of people involved in a cluque is bound to be completely mystified by the illogic of various policy decisions that keep being made, and frustrated at their complete inability to achieve any change in them through naively following the rules and principles of the community as officially written. Only knowledge of more details of the backstory can possibly make sense out of them, and usually one of the aims pursued by various cluque members will be to obscure, cover up, and suppress inquiry into this story.