The only thing that matters now is does the Russian Federation believe the bridge attack was terrorism? If so, Vlad will strike back accordingly with full support and the West is unable to stop it.
If they believe their own propaganda, who's fault is that?
Tell a big enough lie often enough, eventually even you (the one telling the big lie) begin to believe it.
And that's where we are with Putin/Russia.
More on Russia’s counter terrorism strikes. This first round of massive strikes are backed by Russia’s Duma- Vlads Security Council talks were not released. What seems to be clear is Vlad will now start taking his gloves off.
https://www.youtube.com/watch?v=t87YT3WPHPQ