Because it’s been partisan, biased, bluntly inclined to and serving the rotting West and its evil purposes.
You may have already noticed it if you’ve visited Wikipedia pages about communist things. There’re a hell of disparaging remarks/materials against communist states and personalities such as: Cuba, China, Lenin, Stalin and other Soviet and Chinese leaders. It has also been critical of those who’re against the fucking West. Libyan leader Muammar Qaddafi, Iran’s president Ahmadinejad, Venezuelan President Hugo Chavez etc. are some of them.
Besides that, there’re a lot of derogatory and deprecating remarks on the so called ‘third world’- related materials, too.
Instead of dishing out the facts, Wikipedia is acting as a mere tool of the West to disseminate its malign interests.
Jimmy Wales may have revolutionized the way we use the Internet, but he may not know how his brain-child has already slipped into the hands of white motherfuckers.
Or, he himself is overseeing this orchestration?! God knows.