As for Chechnya, ethnic cleansing started in '91 with the expulsion at the end of a gun of 450,000 Russians, Georgian, Jews and Armenians, shortly followed by the expulsion of 500,000 moderate Chechins. This continued with the self exile of 250,000 more Chechins as the Russian forces drove in during '99. But then again, refugees vote with their feet..and where did these Chechins vote? In Russia, as they were all heading North, while Federal Forces were heading South!
As for why this war started, couldn't have anything to do with the proclamation of the Mashkedov government of the rise of the Taliban Republic of the Caucusses to stretch and include all the lands of the Caucuses and Southern Russia/Ukraine. And the invasion of Daghestan by Bashkedov, the Minister of Defense of Chechnya, and the subsequent (all video taped by the Chechyns themselves) extermination of several Daghistani villages that resisted.
Oh, but it must have been those conspiracy theories, after all, Islam is all loving. You live in a fantasy world...and for your information, most American records are kept secret for 50 years and Brit records for 90 years.