Do you think the USSR was responsible for the war in 1941-1945, for example? And what is most surprising is that you consider the source in which the Russian war indicated the terrorist act of 1999, when сhechen terrorists seized the hospital and maternity hospital, to be irrefutably correct.
The war of 1941-45, so called “Great Patriotic War”, is an episode of the Second Word War. The reason why it was called so in Soviet Russia, was to conceal inconvenient truth about Russia’s role in WWII between September 1939 and June 1941. And the truth is: Russia together with Germany conspired the war, entered into pact with Germany (so called Molotov–Ribbentrop Pact), aiming to conquer and divide Europe (secret protocol to the Pact), together with Germany executed the military plans, invading Poland, capturing Baltic states, parts of Romania and attacking Finland, while suppling food and natural resources to its German allies while they were capturing the rest of continental Europe and bombing Britain. Too bad, the honeymoon between Stalin and Hitler did not last long. So yes, the WWII was started by Germany and Russia.
The Budyonnovsk hospital hostage crisis that you are referring to happened in 1995, not in 1999. It was the episode of the 1st Chechen War (1994-96).
It was the 2nd Chechen War that broke out in 1999. The war conveniently coincided with transition of power from unpopular president Yeltsin to his chosen successor Mr. Putin, who at the time was Prime Minister before serving as the head of KGB (the organization changed its name few times, but in essence it remains to be KGB, so I use its well known alias here). The causa belli for the 2nd war were apartment block bombings thousands miles away from Chechnya. Nobody claimed responsibility for the bombings. In one of the incidents, the bombers were arrested by local police while planting explosives in the basement of a building. The arrested turned out to be KGB officers, who were promptly released before disappearing. The war ended few years later, with many thousands killed, and Chechen capital carpet-bombed, while Mr. Putin is serving his 21st year as the president... So yes, 2nd Chechen War was started by Russia, and formal causa belli for that war was crafted by KGB.