They seem not to realize that it is possible to dispute what the facts are, as if they were in all cases absolutely obvious. - Larry Sanger

Basically, the Left tends to invade open institutions, it's been their modus-operandi for the last hundred years. Basically, invading open institutions and subverting them, dominating them, and freezing out anyone who dissents their views. I can't tell you what the cause of the bias on Wikipedia is, I can only tell you that it's really obvious now. It used to be quite obvious 10 years ago, now it's just embarrassing... Now there is an official view about pretty much everything...

A lot of mainstream news stories are broken only in Fox News, the Daily Mail, and the New York Post—all of which are banned from use as sources by Wikipedia. Beyond that, many mainstream sources of conservative, libertarian, or contrarian opinion are banned from Wikipedia as well, including Quillette, The Federalist, and the Daily Caller. Those might be contrarian or conservative, but they are hardly "radical"; they are still mainstream.

One thing that i would recommend, go to Everipedia, edit the article about the Delhi riots: that would be really interesting if you do that, once it is developed give me a link to it and I would be curious to see how the article differs from the Wikipedia article.