That was an interesting place from which to give a speech.
It's very interesting to remember that before 9/11, Saudi Arabia, with US support, was funding restive Muslims with nationalist aspirations in Russia, most notably in Chechnya, in order to keep Russia off balance and focused on their own internal affairs.
It's also interesting that Russia's oil and natural gas transport infrastructure passes through non-Russian ethnic areas (like Tatarstan).
So Russia does have vulnerabilities, despite the "great victory" that the press is falling all over themselves to award them.