It doesn’t have to be the Ukraine that blows up the bridge. Putin can have it blown up to make it look like the Ukraine did it.
Refer back to Hitler and the 1939 false flag “Gleiwitz incident”. Germany was ‘assaulted’, supposedly by Poland. Corpses of armed soldiers dressed in Polish uniforms were presented to the news media and Germany now had good reason to attack Poland.
The allies didn’t buy the deception.
That's what I thought you meant. That's why I referenced the book by the murdered former KGB agent, Blowing Up Russia: Terror From Within. It's precisely how Russia and the KGB/FSB operates.