WWIII? Against a very weak Russia of 1999? That's nothing but hyperbole. Putin was the PM not yet the President, but let's not sidetracked the topic.I think he makes good points.
Keep in mind, he has historically always been pro escalatory. He called for a no-fly zone in the first week of the invasion.
Back in the 90s, he almost started WW3 with Russia over an airfield in Kosovo …